力学专业外语12.ppt

* 6 Center of Mass parabolic 抛物线的 Indian club 火棒，瓶状棒 displacement n. 替换；位移；排水（气） warp n. 弯曲；歪曲 v. 弄弯，翘 bend v. n.弯曲；屈服 7 Rotational Motion beam n. 光线；横梁； 微笑 a beam of light 一束光 electron beam 电子束 balance beam 平衡木 第1、2人称少 ；被动语态多 Television is the transmission and reception of images of moving objects by radio waves. Attention must be paid to the working temperature of the machine. 电视通过无线电波发射和接受活动物体的图象。 应当注意机器的工作温度。 You must pay attention to the working temperature of the machine . Electrical energy can be stored in two metal plates separated by an insulating medium. We call such a device a capacitor, or a condenser, and its ability to store electrical energy capacitance .It is measured in farads. 电能可储存在由一绝缘介质隔开的两块金属极板内。 这样的装置称之为电容器，其储存电能的能力称为电容。 电容的测量单位是法拉。 第1、2人称少 ；被动语态多 名词化结构(1) Archimedes first discovered the principle of displacement of water by solid bodies. 阿基米德最先发现固体排水的原理。 The rotation of the earth on its own axis causes the change from day to night. 地球绕轴自转引起昼夜的变化。 of A direct current is a current flowing always in the same direction 直流电是一种总是沿同一方向流动的电流。 Radiating from the earth, heat causes air currents to rise. 热量由地球辐射出来时，使得气流上升。 分词短语 代替定语从句或状语从句 名词化结构(2) A body can move uniformly and in a straight line, there being no cause to change that motion. 如果没有改变物体运动的原因，那么物体将作匀速直线运动。 Vibrating objects produce sound waves ,each vibration producing one sound wave. 振动着的物体产生声波，每一次振动产生一个声波 分词短语 代替定语从句或状语从句 名词化结构(2) Had Franklin known what we know about lightning in those days, he probably would not have undertaken such a dangerous experiment.如果富兰克林当时与今天我们关于闪电知识的认识一样，他可能不会进行那种危险的（风筝）试验了。 The problem of electronics is how to convey information from one place to another. 电子学要解决的问题是如何把信息从一个地方传递到另一个地方。 Materials to be used for structural purposes are chosen so as to behave elastically in the environmental conditions.。 结构材料的选择应使其在外界条件中保持其弹性 不定式短语代替从句 名词化结构(3) There are different ways of changing energy from one form into another. 将能量从一种形式转变成另一种形式有各种不同的方法。