| 单词 | 密度 |
| 释义 | DEFINITIVE EXAMPLES 权威例句〔COMPARE〕With only 57 inhabitants per square mile, as against a world average of over 70, the country is far from overcrowded. 这个国家每平方英里只有57个居民，与世界的平均密度70多相比，远远称不上人口过于密集。朗文写作活用〔DVD〕A high-density compact disk for storing large amounts of data, especially high-resolution audio-visual material.多功能激光视盘：可储存大量数据的高密度光盘，尤使用于高质量影音作品上美国传统〔HI〕High intensity.高密度美国传统〔LDL〕LDL cholesterol 低密度脂蛋白胆固醇剑桥高阶〔MATERIAL〕They are investigating an area of space that contains more than the usual amount of matter. 他们在探究一片太空区域，那里的物质密度高于通常水平。朗文写作活用〔ON/ON TOP OF〕Ice is less dense than water, which is why it floats. 冰的密度小于水，所以会浮在水上。朗文写作活用〔RETURN〕He's just come back from a vacation in Miami. 他刚从迈阿密度假回来。朗文写作活用〔VLDL〕A lipoprotein containing a very large proportion of lipids to protein and carrying most cholesterol from the liver to the tissues.极低密度脂蛋白：一种脂蛋白，含有大量脂质到蛋白质，并带有从肝脏到组织的大部分胆固醇美国传统〔aerometer〕An instrument for determining the weight and density of air or another gas.气体比重计：测定空气或其他气体的重量及密度的仪器美国传统〔apolipoprotein〕Any of various proteins that combine with a lipid to form a lipoprotein and are a constituent of chylomicrons, HDL, LDL, and VLDL.阿朴脂蛋白，藻胆色素蛋白：同脂质结合形成脂蛋白的各种蛋白质，是乳糜微粒、高密度脂蛋白、低密度脂蛋白和超低密度脂蛋白的成分美国传统〔buoyancy〕The upward force that a fluid exerts on an object less dense than itself.浮力：流体施加给比自己密度小的物体的向上作用的力美国传统〔butyraceous〕Resembling butter in appearance, consistency, or chemical properties.似乳油的，奶油状的：在外观、稠密度和化学性质上象奶油一样的美国传统〔catenary〕The curve theoretically formed by a perfectly flexible, uniformly dense, and inextensible cable suspended from its endpoints.垂曲线：理论上由一条极柔软、密度均匀且长度不变的缆绳从其两端间垂下而形成的曲线美国传统〔charge density〕The electric charge per unit area or per unit volume of a body or of a region of space.电荷密度：一物体单位体积、面积或一空间内的电荷量美国传统〔comparator〕Any of various instruments for comparing a measured property of an object, such as its shape, color, or brightness, with a standard.精密度测量器：一种仪器，用于比较物体的可度量性质，例如按标准度量它的形状、颜色或亮度美国传统〔concentration〕Global ozone concentrations have dropped over the last decade.过去的十年里, 全球臭氧密度降低了。外研社新世纪〔congeal〕The increasing population density will even further congeal traffic.日益增加的人口密度将使交通更加瘫痪。21世纪英汉〔current density〕Physics The number of subatomic particles per unit time crossing a unit area in a designated plane perpendicular to the direction of movement of the particles.【物理学】 粒子流密度：在与粒子的移动方向垂直的指定平面上每单位时间内通过每单位面积的亚原子粒子的数量美国传统〔current density〕Symbol j, J Electricity The ratio of the magnitude of current flowing in a conductor to the cross-sectional area perpendicular to the current flow.符号 j, J 【电学】 电流密度：在某一导体中流动的电流量与电流方向垂直的截面面积之间的比率美国传统〔define〕Thread count is defined as the number of threads in one square inch of fabric.织物经纬密度的定义为每平方英寸织物中线的根数。牛津搭配〔demography〕The study of the characteristics of human populations, such as size, growth, density, distribution, and vital statistics.人口统计学：对人口特征，例如数量、增长情况、密度、分布和人口动态统计等进行研究的学科美国传统〔densely〕Mexico City is one of the most densely populated cities in the world (= a lot of people live close together there).墨西哥城是世界上人口密度最大的城市之一。剑桥高阶〔dense〕Having relatively high density.稠密的：有相对较高的密度的美国传统〔dense〕Less dense substances move upwards to form a crust.密度小的物质向上浮动并形成一硬层。牛津高阶〔dense〕Plutonium is very dense.钚的密度很大。剑桥高阶〔dense〕Water is eight hundred times denser than air.水的密度是空气的八百倍。朗文当代〔densitometer〕An apparatus for measuring the optical density of a material, such as a photographic negative.（光）密度计：测量材料，例如相片感光纸光密度的器械美国传统〔density〕Aluminium is low in density.铝的密度小。剑桥高阶〔density〕Australia has a very low population density.澳大利亚人口密度很小。外研社新世纪〔density〕Computer Science The number of units of useful information contained within a linear dimension.【计算机科学】 信息密度：在一个线性维数内有用的信息单元的个数美国传统〔density〕Jupiter's moon Io, whose density is 3.5 grams per cubic centimetre, is all rock.密度为每立方厘米 3.5 克的木星卫星木卫一上遍布岩石。柯林斯高阶〔density〕Lead has a high density.铅的密度大。剑桥高阶〔density〕The area has a high/low population density.该地区人口密度大／小。剑桥高阶〔density〕The law restricts the density of housing.法律限制房屋的密度。外研社新世纪〔density〕The number of individuals, such as inhabitants or housing units, per unit of area.人口密度：每单位面积居民或住房的数目美国传统〔density〕The population density in this city is very high.这座城市的人口密度很高。牛津搭配〔density〕The quantity of something per unit measure, especially per unit length, area, or volume.密度：某物每单位测度的数量，尤指每单位长度、面积或体积美国传统〔density〕The region has a very high population density.该地区的人口密度很高。柯林斯高阶〔density〕These instruments are used for measuring the density of the atmosphere.这些仪器是用来检测大气密度的。韦氏高阶〔density〕Thickness of consistency; impenetrability.致密度：厚度一致；不可穿透性美国传统〔drop〕A swift decline or decrease, as in quality, quantity, or intensity.下跌：在质量、数量或密度上的迅速下降或减少美国传统〔drop〕To become less, as in number, intensity, or volume.减少：数量、密度或体积的减少美国传统〔dunite〕A dense igneous rock that consists mainly of olivine and is a source of magnesium.纯橄榄岩：一种密度大的大成岩，主要由橄榄石组成，是镁的一种来源美国传统〔edge effect〕The occurrence of greater species diversity and biological density in an ecotone than in any of the adjacent ecological communities.边界效应：群落交错区中产生的现象，其中的物种和生物密度大于任何邻近的生态群落美国传统〔energy density〕The energy per unit volume of a region of space.能量密度：每单位体积的能量美国传统〔front〕Meteorology The interface between air masses of different temperatures or densities.【气象学】 锋面：不同温度、密度的两大气团交界处美国传统〔garden city〕A residential suburb or community planned so as to provide a pleasant environment with low-density housing and open public land.花园城市：设计能提供具有低密度建筑和开阔公共土地的宜人环境的居民区或居住地美国传统〔grade〕A position in a scale of size, quality, or intensity.等级，级别：以尺寸，质量或密度衡量所处的位置美国传统〔hematocrit〕The percentage by volume of packed red blood cells in a given sample of blood after centrifugation.血细胞比容，血球密度：离心沉淀之后所给样血单位容量中板结红血细胞的百分比美国传统〔high-density polyethylene〕A strong, relatively opaque form of polyethylene having a dense structure with few side branches off the main carbon backbone.高密度聚乙烯：指一种浓密、相对而言不透明形式的聚乙烯，此类聚乙烯拥有主要碳系统的少数旁枝组成密实的结构美国传统〔low-density polyethylene〕A form of polyethylene having many side branches off the main carbon backbone and a less closely packed structure than that of high-density polyethylene.低密度聚乙烯：有许多脱离碳主干边支的聚乙烯，相较于高密度聚乙烯其它结构较松散美国传统〔luminous intensity〕The luminous flux density per solid angle as measured in a given direction relative to the emitting source.发光强度：在光源的某一给定方向上测量的固定单位角度上光通量密度美国传统〔mascon〕A mare on the moon having rock of greater density than that of the surrounding area, thus exerting a slightly higher gravitational force.质量密集：月球上的阴暗部，其内部岩石比周围地区的岩石的密度大，因此产生略大些的引力美国传统〔mass〕Astronomers know that Pluto and Triton have nearly the same size, mass, and density.天文学家知道冥王星与海卫一拥有几乎相同的体积、质量与密度。柯林斯高阶〔measure〕The sample's density is a measure of its purity.样品的密度是其纯度的一个计量单位。剑桥高阶〔microdensitometer〕An extremely sensitive densitometer used to detect on a film or photographic plate spectrum lines too faint to be seen by the human eye.显微光密度计；测微密度计：一种极其敏感的密度计，用以测定电影或摄影感光版中人眼看不到的微弱光谱线美国传统〔nephelometer〕An apparatus used to measure the size and concentration of particles in a liquid by analysis of light scattered by the liquid.混浊计：通过分析扩散的光来测量液体中颗粒的大小和密度的仪器美国传统〔occupancy〕Since the 1950s, office density and occupancy in London have increased sharply.自20世纪50年代起, 伦敦办公室的密度和使用率都急剧增长。外研社新世纪〔pitch〕Printing The density of characters in a printed line, usually expressed as characters per inch.【印刷术】 印刷密度：一个印刷品中字的密度，常以每英寸多少个字来表示美国传统〔plasma ball〕A glass ball containing low density gas surrounding an electrode, which stimulates the gas to glow in random, moving streams of light.电浆球：一个玻璃球，里面为低密度气体包围着一个电极，该电极会不时刺激气体发出流动的光美国传统〔populate〕The inner cities are no longer densely populated.市中心的人口密度已下降。剑桥高阶〔pycnometer〕A standard vessel used in measuring the density or specific gravity of materials.比重瓶：一种标准容器，用于测量物质的密度或比重美国传统〔pyrheliometer〕Any of various devices that measure all the intensity of solar radiation received at the earth.直接日射中度计：一种用于测量太阳照射地球的密度的设备美国传统〔rarefaction〕A decrease in density and pressure in a medium, such as air, caused by the passage of a sound wave.稀薄化：介质中密度和压力的下降，例如在空气中，由于声波的穿越而发生美国传统〔refraction〕The turning or bending of any wave, such as a light or sound wave, when it passes from one medium into another of different density.折射： 当光或声波等物质从一个媒体进入别一个密度不同的媒体中时产生的转向或折回美国传统〔saccharometer〕A hydrometer that determines the amount of sugar in a solution from density measurements.糖量计：根据密度大小来确定浓液中的糖的含量的一种液体比重计美国传统〔salinometer〕An instrument that uses electrical conductivity to measure the concentration of salt in a solution.盐液密度计：一种工具，用电流传导测量溶液含盐的浓度美国传统〔saturation〕Physics A state of a ferromagnetic substance in which an increase in applied magnetic field strength does not produce an increase in magnetic intensity.【物理学】 磁性饱和：在提高使用的磁场强度时不会使磁力密度升高的一种磁化饱状态美国传统〔schlieren〕Regions of a transparent medium, as of a flowing gas, that are visible because their densities are different from that of the bulk of the medium.纹影法：透明的媒介区域，如可以看见流动的气体，因为它们的密度不同于媒介主体的密度美国传统〔stationary front〕A transition zone between two nearly stationary air masses of different density.静止锋：两个不同密度近乎静止的空气固的间的过渡地区美国传统〔substance〕Air has little substance.空气的密度很小美国传统〔tenuity〕The quality or condition of being tenuous; lack of thickness, density, or substance.细：细、薄的性质或状态；缺乏厚度、密度或实质美国传统〔terrestrial planet〕Any of the four planets, Mercury, Venus, Earth, or Mars, that are nearest the sun and have similar size and density.类地行星：最靠近太阳并具有相似的体积、密度的四颗行星之一，水星、金星、地球或火星美国传统〔thin〕Not having enough photographic density or contrast to make satisfactory prints. Used of a negative.明暗对比低的：摄影密度不足或无法获得满意的照片。用于底片美国传统〔underpopulated〕Lacking the normal or required population density.人口稀少的：缺乏正常的或所需的人口密度的美国传统〔vapor density〕The ratio of the weight of a given volume of one gas to the weight of an equal volume of another gas, typically hydrogen, at the same temperature and pressure.蒸汽密度：一定量的一种气体的重量与相等量的另一种气体的重量，通常为氢气，在温度和压力相同时的比率美国传统〔vd.〕Vapor density.蒸气密度美国传统〔very low-density lipoprotein〕A lipoprotein containing a very large proportion of lipids to protein and carrying most cholesterol from the liver to the tissues.超低密度脂蛋白：蛋白内包含大量脂质的脂蛋白，将大部分胆固醇从肝脏送入组织美国传统〔wane〕To decrease gradually in size, amount, intensity, or degree; decline.衰落：体积、数量、密度或程度的逐渐减小；衰退美国传统〔washed-out〕Lacking color or intensity; faded.淡色的：缺少颜色或密度的；退色的美国传统〔white dwarf〕A whitish star in a latter stage of development, having low luminosity, small size, and very great density.白矮星：演化后期的白色星星，亮度低，体积小，密度很高美国传统It compresses hot gases to densities greater than those of solids at room temperature.它把热气压缩到一定的密度，使之大于室温中固体的密度。剑桥国际Lead has a high density.铅的密度很高。剑桥国际Plutonium is very dense.钚是高密度的物质。剑桥国际The area had a population density of five people per square mile. 该地区人口密度为每平方英里五人。译典通The area has a high/low population density.该地区人口密度高/低。剑桥国际The density of aluminium is fairly low. [C] Aluminium is low in density.铝的密度相当低。剑桥国际The explosion crushes the plutonium, thereby increasing its density and starting the chain reaction of nuclear fission.爆炸粉碎了钚，因而增强了其密度并引发了核裂变的连锁反应。剑桥国际 |
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