| 单词 | periodically |
| 释义 | DEFINITIVE EXAMPLES 权威例句〔EQUAL/NOT EQUAL〕On cold days the device periodically provides a burst of hot air, to even out the air temperature. 天冷时，这个装置会定期释放热气，使空气温度保持稳定。朗文写作活用〔SOMETIMES〕Children's homes are periodically inspected by government inspectors. 政府视察员定期巡视儿童收容所。朗文写作活用〔amplitude〕Physics The maximum absolute value of a periodically varying quantity.【物理学】 振幅：周期性变量的最大绝对值美国传统〔appear〕New strains of viruses appear periodically.新菌系的细菌周期性地产生美国传统〔baste〕To moisten (meat, for example) periodically with a liquid, such as melted butter or a sauce, especially while cooking.在…上滴（浇、抹）油脂：尤指烹调（肉类）时，间歇地淋上一种液体加以润湿，如溶化了的奶油或酱汁美国传统〔custody〕The man spent seven hours in custody, periodically being questioned by the police.那个男人被拘留了七个小时, 期间不时接受警方的审问。外研社新世纪〔diction〕Periodically poets revolt against the prevailing style of poetic diction.诗人们偶尔会反感流行的诗歌措辞风格。外研社新世纪〔emerge〕Sea mammals must emerge periodically to breathe.海生哺乳动物必须不断地浮现出海面呼吸美国传统〔erupt〕Epidemics periodically erupted throughout the 19th century.整个 19 世纪流行病周期性爆发。牛津搭配〔escape wheel〕The rotating notched wheel periodically engaged and disengaged by the anchor in an escapement.（钟表的）擒纵轮：在（钟表的）擒纵机构中带有刻痕的旋转齿轮，可与钟锚周期性的啮合和不啮合美国传统〔fundamental〕Physics The lowest frequency of a periodically varying quantity or of a vibrating system.【物理学】 基频：周期变化量或振动系统的最低频率美国传统〔intermittent current〕A periodically interrupted unidirectional electric current.间歇电流：一种间断性中断地单向电流美国传统〔intermit〕To suspend or cause to suspend activity temporarily or periodically.暂停：暂时地或阶段性地推迟或使活动推迟美国传统〔interrupter〕Electronics A device that periodically and automatically opens and closes an electric circuit, producing pulses.【电子学】 断续器：一种阶段性的能自动打开及关闭电路并产生脉冲的仪器美国传统〔migrate〕To change location periodically, especially by moving seasonally from one region to another.迁移，移栖：定期变换所在地，尤指季节性地从一地迁移到另一地美国传统〔molt〕To shed periodically part or all of a coat or an outer covering, such as feathers, cuticle, or skin, which is then replaced by a new growth.蜕皮，换毛：分阶段地脱掉部分或全身的皮毛或表面覆盖物，如羽毛、表皮或外皮，随后便为新长出的代替美国传统〔ozone hole〕An area of the ozone layer, such as the large area over Antarctica or the smaller area over the North Pole, that periodically becomes depleted of ozone.臭氧层破洞：会出现周期性臭氧破洞的臭氧层区域，如位于南极洲上空大块区域与北极上空小块区域美国传统〔pendulum〕The spaceship's jets were fired periodically to dampen a side-to-side pendulum motion that had developed.宇宙飞船的喷射装置周期性地喷射，以减缓飞船出现的左右摇摆现象。剑桥高阶〔periodic law〕The principle that the properties of the elements recur periodically as their atomic numbers increase.周期律：元素属性根据原子数的增长周期性出现的规律美国传统〔periodically〕Meetings are held periodically to monitor progress on the case.定期举行会议以监督案件的进展。柯林斯高阶〔periodically〕Meetings are held periodically to monitor progress.定期召开会议以监督进度。外研社新世纪〔periodically〕Police were periodically patrolling the area.警察会不时地在该地区巡逻。外研社新世纪〔periodically〕Police were periodically patrolling the area.警察定时在这一地区巡逻。柯林斯高阶〔periodically〕The directory is updated periodically.电话号码簿定期更新。韦氏高阶〔periodically〕The equipment should be tested periodically.设备应定期检测。剑桥高阶〔periodically〕They met periodically during the summer.在夏天他们定期见面。文馨英汉〔periodically〕We see each other periodically.我们偶尔见面。英汉大词典〔periodically〕You should have your eyes examined periodically.你应定期去检查眼睛。英汉大词典〔periodic〕Mailing lists are updated periodically.邮寄名单定期更新。牛津高阶〔periodic〕She suffers periodically from back pain.她时不时会感到背部疼痛。麦克米伦高阶〔periodic〕Teachers meet periodically to discuss progress.教师定期开会讨论进度。朗文当代〔progress〕They looked in periodically to check the work in progress.他们时不时地朝里张望，为的是查看正在进行的工作。朗文当代〔report card〕A report of a student's progress presented periodically to a parent or guardian.成绩报告单：定期向学生的父母或监护人递呈的关于学生的学业进展的报告书美国传统〔return〕Her symptoms returned periodically.她的症状时不时地出现。牛津搭配〔revalue〕The company's assets are periodically revalued.这家公司的资产定期接受重新评估。剑桥高阶〔review〕This figure will be reviewed periodically in the light of inflation.我们会根据通货膨胀率定期审核这一数字。牛津搭配〔scavenge〕The streets are periodically scavenged.定期街道清理美国传统〔spectroscopic binary〕A binary star system that is identified by periodically shifting lines in its spectrum.周期性变换其光谱谱线的双星系美国传统〔spittoon〕A bowl-shaped, usually metal vessel, often with a funnel-shaped cover, into which tobacco chewers periodically spit.痰盂：一种碗状金属容器，通常有一漏斗状盖子，烟草咀嚼者定时地往里吐东西美国传统〔stream〕The reactor is periodically taken off stream.这个核反应堆定时会关闭。外研社新世纪〔sunspot〕Any of the relatively cool dark spots appearing periodically in groups on the surface of the sun that are associated with strong magnetic fields.黑子：周期性地成群出现在太阳表面的温度相对较低的暗点，与强磁场有关美国传统〔town〕Chiefly British A rural village that has a market or fair periodically.【多用于英国】 定期有集市的农村美国传统〔tracking poll〕An opinion poll in which the same sample, such as a small number of voters, is questioned periodically to measure shifts in opinion.跟踪民意测验：一种民意测验方式，定期对同一取样组，如少量的选民，进行询问以测出意见的变化美国传统The company's assets are periodically revalued.公司的资产被定期重新估价。剑桥国际The equipment should be tested periodically (= at regular times).设备应定期检测。剑桥国际The spaceship's jets were fired periodically to dampen a side-to-side pendulum motion that had developed.宇宙飞船的喷气发动机定期喷射以减小飞船产生的左右摇摆。剑桥国际 |
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