| 单词 | learning |
| 释义 | DEFINITIVE EXAMPLES 权威例句〔-lined〕Learning lines is very easy. Acting is very difficult.记台词很容易。表演很难。柯林斯高阶〔ABC〕He's learning his ABC at school.他在学校里学习字母。剑桥高阶〔Alcuin〕Anglo-Saxon prelate and scholar who was a leader in the revival of learning in medieval Europe.阿尔昆：盎格鲁-撒克逊高级教士及学者，为中世纪欧洲文化复兴的一个领袖美国传统〔BABY〕There are clear differences in speed of learning between infants at this early stage. 这个阶段的婴儿虽然都还很小，但在学习速度上已有了明显的差别。朗文写作活用〔BAD〕He's been learning English for five years, but his pronunciation isn't very good. 他学英语有五年了，但发音仍不太好。朗文写作活用〔BELIEVE〕When I started as a teacher I had the mistaken belief that all kids are interested in learning. 我刚开始当老师时错误地以为所有孩子都对学习感兴趣。朗文写作活用〔CONFIDENT/NOT CONFIDENT〕Students with learning difficulties who do not have a dedicated teacher can become discouraged very easily. 有学习障碍的学生如果没有一位尽心竭力的老师，极易灰心丧气。朗文写作活用〔CONFUSED〕Children often mix up ‘b’ and ‘d’ when they're learning to write. 孩子学写字母的时候常常分不清b和d。朗文写作活用〔DIFFICULT〕Bloom states clearly that he believes that many schools provide unfavorable learning conditions. 布卢姆明确表示他认为许多学校提供的学习条件都不佳。朗文写作活用〔DISABLED〕He's studying to teach children who have learning difficulties. 他在学习如何教育有学习障碍的儿童。朗文写作活用〔DISABLED〕Studies say exposure to loud continuous noise can cause learning disabilities and behavioral problems in children. 研究显示，持续的吵闹噪音可以导致儿童发生学习障碍和行为问题。朗文写作活用〔Dutch〕He loves learning about the Dutch.他喜欢去了解荷兰人。韦氏高阶〔LEARN〕His daughter's learning to drive. 他的女儿正在学开车。朗文写作活用〔OLD-FASHIONED〕Mr Griffiths is a real old-fashioned teacher who still believes that learning lessons by heart is the best method. 格利菲斯先生是一位非常老派的教师，仍然认为背诵课文是最好的方法。朗文写作活用〔ORGANIZE〕The social workers’ home visits are highly structured, with specific goals and learning objectives. 社会工作者的家访是很有条理的，有明确的目的和学习目标。朗文写作活用〔PART〕Falling over is part of the process of learning to ski. 跌跤是学习滑雪过程中的一部分。朗文写作活用〔PROBLEM〕Many of the children encountered some difficulty in learning the material. 这些孩子中许多人在学习这种教材时都遇到过一定困难。朗文写作活用〔RESULT〕If students constantly fail, the end result is that they switch off any interest in learning. 如果学生不断地失败，结果会令他们丧失一切学习兴趣。朗文写作活用〔SPEED〕The Kumon method involves students learning at their own pace. 公文教育法让学生以自己的步伐学习。朗文写作活用〔TIME〕Omar's been learning English for two years now. 奥马尔学英语已有两年了。朗文写作活用〔Thoth〕The Egyptian god of the moon and of wisdom and learning.索斯：埃及的月亮、智慧和学识之神美国传统〔Torah〕The entire body of religious law and learning including both sacred literature and oral tradition.律法：包括神学文章和口头传说的全部宗教法律和知识的总体美国传统〔UNDERSTAND/NOT UNDERSTAND〕When a child is learning something new, they try to assimilate it in terms of what they already know. 孩子学习新事物时，会根据已有的知识来吸收和理解。朗文写作活用〔USEFUL〕A knowledge of Latin can have its uses -- for instance, it can help you if you are learning Italian. 懂拉丁文是有用处的—比方说，你学意大利语就能派上用场。朗文写作活用〔academic〕Of, relating to, or characteristic of a school, especially one of higher learning.学校的，学院的：学校的、与学校有关的或具有学校特征的，尤其具有较高学识的美国传统〔aid〕A good dictionary can aid language learning.一部好词典有助于语言学习。英汉大词典〔aid〕Dictionaries are essential aids to learning.词典是辅助学习的必备工具。牛津搭配〔analytical〕Some students have a more analytical approach to learning.有些学生的学习方法更具分析性。剑桥高阶〔approach〕He criticized the one-size-fits-all approach to learning.他批评一刀切的学习方法。牛津搭配〔app〕There are apps for everything, from learning a language to booking movie tickets.现在的应用程序应有尽有，从学习语言到购买电影票都可以做到。剑桥高阶〔assiduous〕Podulski had been assiduous in learning his adopted language.波多斯基学习外语时一直很勤奋。外研社新世纪〔associative learning〕A learning principle based on the belief that ideas and experiences reinforce one another and can be mentally linked to enhance the learning process.联想性学习：一种学习原则，认为观点与经验互相加强并能联成一体以促进学习过程美国传统〔attempt〕As a teacher, he endeavors to inspire a love of learning in his students.作为老师，他一直努力激发学生们对学习的热爱。韦氏高阶〔at〕They are quick [slow] at learning.他们敏[钝]于学习。文馨英汉〔avocation〕Learning foreign languages is just an avocation with me.学习外语对我来说只不过是一种业余爱好。英汉大词典〔awe〕She is in awe of his learning.她对他的学识满怀敬畏。外研社新世纪〔awful〕I don't know an awful lot (= very much) about art, but I'm learning.我对艺术知道的不是特别多，但是我正在学。剑桥高阶〔bagpipe〕He's learning to play the bagpipes.他正在学吹风笛。韦氏高阶〔be nothing to it〕Learning the game is easy - there's nothing to it.学会这项运动很容易——没什么难的。剑桥高阶〔begin〕Jane has just begun learning to drive.珍妮刚开始学开车。剑桥高阶〔benefit〕One of the many benefits of foreign travel is learning how to cope with the unexpected.学会如何应付突发事件是海外旅游的众多益处之一。剑桥高阶〔bent〕She is bent on learning English.她一心想学英语。英汉大词典〔better〕The younger you start learning a language, the better you'll speak it.开始学语言年龄越小说得越好。朗文当代〔bike〕My youngest child is learning to ride a bike.我最小的孩子正在学骑自行车。剑桥高阶〔blow off〕I didn't feel like learning, so I blew off class.我不想学习, 就逃课了。外研社新世纪〔bother〕Why bother learning all those facts?为什么要费劲记那些事实呢？外研社新世纪〔breadth〕He showed an astonishing breadth of learning for one so young.他年纪轻轻就显示出宽广的知识面，很令人吃惊。剑桥高阶〔budget〕I'm learning how to budget.我正在学习如何做预算。外研社新世纪〔car〕She's learning to drive a car.她在学开车。麦克米伦高阶〔choose〕Learning should no longer be an elitist pastime for the chosen few.学习不应再是少数人的高级消遣。柯林斯高阶〔citizenship〕The students are learning the value of good citizenship.学生们在学习良好公民应有品德的价值。韦氏高阶〔clinic〕The hospital is holding/having a pain clinic on Tuesday night for anyone interested in learning how to deal with chronic pain.这家医院周二晚上将举办一次健康讲座，凡是想了解如何应对慢性疼痛的人都可以参加。韦氏高阶〔compulsory〕In East Germany learning Russian was compulsory.在东德, 学习俄语是强制的。外研社新世纪〔constitute〕Listening, speaking, reading, then writing constitute the fundamental order in language learning.听、说、读、写是学习语言的根本顺序。21世纪英汉〔contribute〕Parental involvement contributes significantly to children's learning.父母的参与对孩子学习有重要的作用。牛津搭配〔control〕Students are encouraged to take control of their own learning, rather than just depending on the teacher.鼓励学生要自己安排学习，而不只是依赖老师。朗文当代〔conviction〕These experiences reinforced my conviction that music helps learning.这些经历增强了我的信念：音乐有助于学习。牛津搭配〔crawl〕She is just learning to crawl.她刚开始学爬。麦克米伦高阶〔defeat〕I'm afraid anything that involves language learning has always defeated me (= I have been unable to do it).恐怕凡是与语言学习沾边的事都会把我难倒。剑桥高阶〔designate〕Several pupils were designated as having moderate or severe learning difficulties.几名学生被认定有中等或严重学习困难。牛津高阶〔didactic〕He is more didactic in his approach to the learning process.他在教学过程中更侧重于灌输。外研社新世纪〔difference〕The two communities are learning how to resolve their differences.这两个社群正在学着如何解决彼此之间的分歧。柯林斯高阶〔disability〕No one knows what causes learning disabilities.学习障碍的成因无人知晓。牛津搭配〔discipline〕Learning poetry is a good discipline for the memory.背诗是训练记忆力的一种好方法。朗文当代〔disengage〕Too many young people disengage from learning.太多的年轻人对学习不感兴趣。朗文当代〔division〕After learning multiplication, the students were taught division.学完乘法，学生接着学除法。韦氏高阶〔dyslexia〕A learning disorder marked by impairment of the ability to recognize and comprehend written words.诵读困难：一种学习障碍，症状是识别或理解书写文字的能力受到损伤美国传统〔education〕The field of study that is concerned with the pedagogy of teaching and learning.教学法：研究教与学方法的学科美国传统〔education〕The knowledge or skill obtained or developed by a learning process.知识：学习过程中掌握的或发展起来的知识或技巧美国传统〔encyclopedism〕Encyclopedic learning.广博的学识美国传统〔end〕IT is a tool for learning, not merely an end in itself.信息技术是一种学习工具，而不只是为了本身的目的。朗文当代〔especially〕Feedback is especially important in learning skills.反馈意见在学习技能的过程中特别重要。朗文当代〔evade〕Wisdom consists in learning when to evade and when to oppose head-on.明智在于懂得何时应退避三舍,何时应正面硬顶。英汉大词典〔evening class〕Jackie has been learning flamenco dancing at an evening class for three years.杰基已经在夜校学习了3年的弗拉门戈舞。柯林斯高阶〔facilitate〕Structured teaching facilitates learning.有条理的教导有利于学习。牛津高阶〔facilitator〕The teacher acts as a facilitator of learning.教师是学习的诱导者。牛津高阶〔feel〕It felt like learning the rules of a new game.这就像是在学习一个新游戏的规则。外研社新世纪〔fish〕Brian remembers learning to fish in the River Cam.布赖恩记得曾在剑河学过钓鱼。柯林斯高阶〔flexibility〕The flexibility of distance learning would be particularly suited to busy managers.远程学习的灵活性尤其适合忙碌的管理人员。外研社新世纪〔formal〕Learning was by rote and strictly formal.那时学习靠的是死记硬背，极为刻板。牛津搭配〔for〕I've been learning French for two years.两年里我一直在学习法语。外研社新世纪〔frustrating〕Learning is not fun. It is actually quite frustrating.学习并不是好玩的事,实际上学习过程中人会遇到好些挫折。英汉大词典〔fun〕He's learning French for fun.他学法语是为了好玩。英汉大词典〔guitar〕I'm learning to play the guitar. = (US) I'm learning to play guitar.我正在学习弹奏吉他。韦氏高阶〔habituated〕People in the area are habituated to the idea of learning from the person above how to do the work.该地区的人们习惯于向上级学习如何工作。柯林斯高阶〔honor〕Her veneration for traditional learning never wavered.她对传统学问的敬意从未动摇。美国传统〔humanism〕The study of the humanities; learning in the liberal arts.对人文学科的研究；对自由主义艺术的学习美国传统〔ideal〕Language learning often takes place in a less than ideal environment.语言学习经常在不尽理想的环境中进行。牛津搭配〔imitation〕Children are seen as learning to write by direct imitation of adult models.人们认为儿童通过直接模仿成人范本学习写作。牛津搭配〔inevitability〕She was learning to accept the inevitability of death.她正在学着接受死亡的必然性。牛津搭配〔interest〕He expressed/showed an interest in learning more about photography.他表达/显露出了进一步学习摄影的兴趣。韦氏高阶〔interlanguage〕The type of language produced by nonnative speakers in the process of learning a second language or foreign language.人工辅助语言：一种由非本族语使用者在学习第二语言或外语的过程中形成的语言美国传统〔investigative〕Children are encouraged to take an investigative approach to learning.鼓励孩子们进行探究性学习。剑桥高阶〔jazzed〕It's great to be in a classroom where the kids are jazzed about learning.教室里的孩子们都对学习内容十分兴奋，在这样的地方感觉真好。剑桥高阶〔juggle〕He is learning to juggle.他在学习玩杂耍。韦氏高阶〔learning curve〕A graph that depicts rate of learning, especially a graph of progress in the mastery of a skill against the time required for such mastery.学习曲线：描述学习速率的图表，尤指在要求掌握的时间期限内，学会某种技术的进程图美国传统〔learning curve〕Both he and the crew are on a steep learning curve.他和组员们都学得很快。柯林斯高阶〔learning curve〕It's a steep learning curve when you're thrown into a job.当你没有准备突然开始一个新工作的时候，发展进步是很曲折的。剑桥高阶〔learning curve〕There is a learning curve in the process of seeking employment.找工作有个积累经验的过程。外研社新世纪〔learning process〕It's part of the learning process.这是学习过程的一部分。外研社新世纪〔learning〕A little learning is a dangerous thing.一知半解, 为害不浅。英汉大词典〔learning〕A little learning is a dangerous thing.一知半解为害不浅。文馨英汉〔learning〕My summer job wasn't fun but it was a real learning experience for me.一次学习体验（从中大体了解自己、他人或生活）麦克米伦高阶〔learning〕The school aims to provide a supportive learning environment.学校致力于提供一种有助于学习的环境。牛津搭配〔learn〕H spent three hours learning Lincoln's Address at Gettysburg by heart.他花了三小时把林肯的《葛底斯堡讲话》背了下来。21世纪英汉〔learn〕He is learning quickly.他学得很快。韦氏高阶〔learn〕In history we're learning about the Russian revolution.历史课上我们正在学习俄国革命的内容。外研社新世纪〔learn〕She'll go to great lengths to keep you from learning her secrets.她会想尽办法不让你知道她的秘密。麦克米伦高阶〔learn〕We are learning how to confront death instead of avoiding its reality.我们正在学着如何勇敢面对死亡而不是回避其存在的现实。外研社新世纪〔line〕He was learning his lines.他在练台词。文馨英汉〔literary〕Versed in or fond of literature or learning.精通文学的，爱好文学的，博学的美国传统〔make〕The noise in the school makes learning difficult.学校里的吵闹声让人很难安心学习。麦克米伦高阶〔master〕Once you've mastered the basics, try learning more difficult chords.一旦你掌握了基本技能，就试一试学习更难的和弦。牛津搭配〔math〕She's learning calculus in math class.她在数学班学微积分。朗文当代〔medium〕Video is a good medium for learning a foreign language.录像是一种学习外语的好方法。牛津高阶〔militate against〕Family tensions can militate against learning.家庭关系紧张可能会妨碍学习。外研社新世纪〔more〕We are learning more and more about the effects of radiation on the human body.我们越来越了解辐射对人体的影响。麦克米伦高阶〔motivate〕We must motivate students to take charge of their own learning.我们必须激励学生管好自己的学习。麦克米伦高阶〔mouse〕Some of these mouse-click short cuts are worth learning.这其中的一些单击鼠标快捷方式值得学习。牛津搭配〔multiply〕The children are already learning to multiply and divide.孩子们已经开始学习乘法和除法了。牛津高阶〔mutual〕The two men were a mutual admiration society , gushing about how much they were learning from each other.两个男人互相吹捧，狂赞对方让自己学到了很多东西。朗文当代〔ollie〕He's learning how to ollie a skateboard over a car.他正在学习怎么带着滑板腾空飞越汽车。外研社新世纪〔orthodoxy〕The current orthodoxy is child-centred, not teacher-centred, learning.当前公认的学习方法是以孩子为中心，而不是以教师为中心。麦克米伦高阶〔other〕He likes travelling abroad and learning about other people's customs and traditions.他喜欢到国外去旅行，并了解其他民族的风俗习惯。剑桥高阶〔part〕I'm learning the violin part of this quartet.我在学习四重奏中的小提琴部分。外研社新世纪〔pedant〕One who pays undue attention to book learning and formal rules.学究：过分注重书本学习和墨守陈规的人美国传统〔photograph〕I'm learning how to post photographs on my blog.我正在学习如何在博客上发照片。牛津搭配〔play〕He's learning to play the piano.他在学习弹钢琴。朗文当代〔play〕I'm learning to play sax.我正在学习演奏萨克斯管。牛津搭配〔process〕Learning a foreign language can be a long/slow/difficult process.学习外语会是一个漫长/缓慢/艰难的过程。韦氏高阶〔process〕Learning a language is a slow process.学习一门语言是一个缓慢的过程。麦克米伦高阶〔process〕It's a normal part of the learning process.那是学习过程中的正常现象。牛津高阶〔process〕It's all part of the learning process.这完全是学习过程的一部分。剑桥高阶〔process〕Repetition can help the learning process.重复对学习过程有帮助。朗文当代〔progress〕He felt he still needed to progress further in his learning.他感觉自己在学业上仍需进一步提高。牛津搭配〔realize〕They are constantly learning, without even realizing it.他们没有意识到自己在不断地学习新东西。牛津搭配〔reliance〕Such learning methods encourage too great a reliance upon the teacher.这样的学习方法会造成对老师的过分依赖。牛津高阶〔relieve〕She relieved her boredom at home by learning how to type.她在家学打字来打发无聊的时光。剑桥高阶〔repetition〕Repetition helps learning.背诵有助学会。英汉大词典〔replete〕His is a mind replete with learning.他是位饱学之士。英汉大词典〔retrieve〕The dog is learning how to retrieve.这只狗在学习如何衔回猎物。韦氏高阶〔rote〕Rote learning does not really give people any insight into their subject.死记硬背式的学习不能让人真正理解所学的课程。麦克米伦高阶〔rudiments〕She helped to build a house, learning the rudiments of brick-laying as she went along.她参与了盖房子，并在施工过程中学习了砌砖的基本技巧。柯林斯高阶〔school〕She attends a special school for children with learning difficulties.她上的是一所为有学习困难的儿童开办的特殊学校。牛津搭配〔senseless〕If your child is thirsty for learning, then it is senseless to hold her back.如果你的孩子渴望学习，那就不要毫无益处地进行阻拦。柯林斯高阶〔severe〕This is a school for children with severe learning difficulties.这是一所为有严重学习障碍的孩子设立的学校。剑桥高阶〔shortcut〕There are no shortcuts to learning.做学问是无捷径可走的。英汉大词典〔shortcut〕There are no shortcuts to/for learning another language.学习外语没有捷径可走。韦氏高阶〔side〕I am learning a lot on all sides.我正从各方面学到很多东西。英汉大词典〔simulator〕People learning to fly often practise on a flight simulator.学习飞行的人常常在飞行模拟器中进行练习。剑桥高阶〔solo〕She is learning to fly and she flew her first solo yesterday.她正在学习驾驶飞机，昨天完成了她的首次单飞。韦氏高阶〔start〕I started learning French three years ago.我三年前开始学习法语。外研社新世纪〔stride〕He's still learning and when he hits his stride, he'll be unstoppable.他仍旧处在学习阶段，一旦驾轻就熟后将势不可挡。柯林斯高阶〔substitute〕When learning a language, there is no substitute for living among native speakers.学习一种语言，没有比生活在母语使用者当中更好的方法了。韦氏高阶〔tachistoscope〕An apparatus that projects a series of images onto a screen at rapid speed to test visual perception, memory, and learning.视觉记忆测试镜：一种快速地将一系列形象投射到屏幕上以检验视觉、记忆和学习能力的仪器美国传统〔talk〕Her child is learning to talk.她的孩子正在学说话。21世纪英汉〔teach〕She teaches children with learning difficulties.她教学习有障碍的孩子。麦克米伦高阶〔the〕Fiona's learning the flute.菲奥娜在学吹长笛。朗文当代〔the〕I'm learning the guitar.我在学弹吉他。外研社新世纪〔time〕Learning a language isn't easy – it takes time (=takes a long period of time) .学一门语言不容易 — 这需要时间。朗文当代〔unconditioned response〕A natural, usually unvarying response evoked by a stimulus in the absence of learning or conditioning.无条件反应：在未经学习或无条件作用的情况下由刺激物所引起的自然的，通常不变的反应美国传统〔utmost〕Learning is of the utmost importance.学习是最重要的。英汉大词典〔vacuum〕Learning cannot occur in a vacuum.学习不能脱离实际。麦克米伦高阶〔video〕They produce educational videos for learning languages.他们制作语言教学录像带。牛津搭配〔visual〕Maps are a visual tool for learning.地图是一种直观的学习工具。韦氏高阶〔we〕The children have a chance of learning to deal with adults, without the we-they feeling.孩子们有机会学会与成人相处而无我们-他们的感觉。英汉大词典〔who's who〕I'm still learning who's who around the office.我还在熟悉办公室每个同事的情况。韦氏高阶〔work〕Learning a language isn't easy. You have to work at it.学语言不容易，必须努力学习。朗文当代〔write〕Emily is just learning to write.埃米莉刚刚开始学写字。麦克米伦高阶〔write〕I'm learning to read and write.我在学习读书写字。英汉大词典〔write〕In some countries children don't start learning to read and write until they are six.有些国家的儿童到了六岁才开始读书写字。牛津高阶〔yeshiva〕An institute of learning where students study the Talmud.犹太高等学校：学生学习犹太教法典的学院美国传统Learning by rote is discouraged in this school. 这所学校不鼓励死记硬背的学习方式。译典通Learning to ride a bike was a difficult/easy thing (= was difficult/easy) for me to do.学骑自行车对我来说是难/易事。剑桥国际Asymmetry in language learning means that learners tend to understand more than they can say.语言学习中的不平衡是指学习者理解能力高于表达能力。剑桥国际Creative, two-way learning between teacher and pupil can take place. 教师和学生之间创造性的双向学习是可以实现的。译典通He applied himself to learning French. 他致力于学习法语。译典通He has a great capacity for learning languages. 他学语言的能力很强。译典通He was well punished for his blasphemy against learning. 他因亵渎学问受到了应有的惩罚。译典通He's learning his ABC at school.他正在学校里学习字母。剑桥国际I don't know an awful lot (=very much) about art, but I'm learning.我对艺术懂得不多，但我正在学。剑桥国际I encountered great difficulties in learning English grammar. 我在学习英文文法时遇到了很大困难。译典通I spent my time profitably (= used it to get advantages or benefits), reading a lot and learning a new language.我有效地利用时间，大量阅读并学了一门新语言。剑桥国际I'm learning to touch-type (= to use a keyboard without looking at the keys).我正在学习不看键盘按指法打字。剑桥国际I've been learning music for a long time, but I still can't play it on / at sight (= the first time I see it).我学习音乐已经有很长时间了，但我仍不能一看到它(曲谱)就演奏。剑桥国际I've been learning to paint animals -- this is one of my early attempts (=examples of my work).我一直在学着画动物----这张画是我早先的习作。剑桥国际I've had to concentrate very hard on learning to drive--it didn't come naturally to me.我必须全神贯注地学驾车，我不是天生就会开车的。剑桥国际My youngest child is learning how to ride a bike.我最小的孩子正在学习骑自行车。剑桥国际One cannot learn a language well merely by learning its grammatical rules. 光学文法规则是学不好语言的。译典通One of the many benefits of foreign travel is learning how to cope with the unexpected.学会如何应付突发事件是出境旅游的众多益处之一。剑桥国际People learning to fly often practise on a flight simulator (= equipment which represents real conditions esp. in an aircraft or spacecraft).学习飞行的人通常在飞行模拟器中进行练习。剑桥国际She is learning how to dance on her points.她学习如何用鞋尖跳舞。剑桥国际She won't have any troubles learning to ride a horse--you can see she's a natural.她学骑马不会有任何困难，她是个天生骑马的料子。剑桥国际She's writing a book on human learning, memory and cognition (= mental processes).她正在写一本关于人类学习、记忆和认知过程的书。剑桥国际Some students have a more analytical approach to learning.有些学生在学习上采用较具分析性的方法。剑桥国际The course combines classroom training with online learning.这个课程将课堂练习与在线学习结合起来。牛津商务The five-day week is now usual in institutions of higher learning. 每周上五天课在高等学府已很普遍。译典通The idea with young children is to integrate learning with play.对幼儿的办法是寓教于乐。剑桥国际This technique makes learning fun.这项技术使学习变得有趣。剑桥国际Universities are working with businesses and local people to promote lifelong learning.大学正与企业和当地人合作推广终生学习。牛津商务 |
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英汉汉英翻译词典包含1679246条英汉翻译词条，基本涵盖了全部常用英语单词及常用语的翻译及用法，是英语学习及翻译工作的有利工具。