? They cited cases of identical twins reared in different homes who developed very
different characteristics despite identical heredity.他们列举了一些这样的事例：在不同的家庭抚养的一对双胞胎尽管遗传特性完全相同，但会显示出完全不同的个性。 ? They consider it no use adding more catalysts in the solution.他们认为在溶液里
再加催化剂没有用。 ? They have put up 150 rooms in fixed housing and 36 tents. 他们盖起了150间固
定房屋，搭起了36座帐篷。 ? They wonder if users could interact with data the way they interact with other
entities on a day-to –day basis.他们想知道用户是否能用日常与其他实体交互的方式同数据交互。（if 引导宾语从句） ? They’re the ones that are caused by viruses and fungi.这些是由病毒和真菌引起的肺炎。 ? This driving force tending to produce the motion of electrons through a circuit is
called an electromotive force or e.m.f for short.这种能使电子通过电路运动的驱动力称之为电动势或简称e.m.f.。 ? This experiment is an absolute necessity in determining the solubility.对确定溶
解度来说，这种实验室绝对必要的 ? This experiment is an absolute necessity in determining the solubility.对确定溶
解度来说，这种实验室绝对必要的 ? This flat screen technology can achieve a high level of focus to please
professional users using graphic intensive application.这种纯平面技术可以达到高水平的聚焦效果，令应用各种绘图软件的专业人士感到满意。 ? This information will be encoded in a radio signal and beamed to the units buried
in the road.这一信息被译成无线电信号，发射给埋在道路下的电子装置。 ? This investigation is concerned with identifying the effects, if any, of the major
alloying elements on hot cracking.这一研究与确定主要合金元素对热裂可能产生的影响有关。 ? This is what the information systems community should be striving to achieve.这
是信息系界应追求实现的东西。 ? This is where the new design has the advantage.这就是新设计的优越之处。
（where 引导表语从句） ? This is“good”ozone because it protects us from the sun’UV rays.这事良性臭
氧。因为这部分臭氧保护我们免遭太阳紫外线的伤害。 ? This kind of pump is suitable for handing solutions containing certain corrosive
gases.这种泵适合于处理含有某些腐蚀性气体的溶液。
? This month we have produced 140% the number of transformers of last month.这
个月，我们制造的变压器的数量是上个月的140%。 ? This residue of primordial energy is like the warmth from dying colas.这种原生
能量的残余就像行将熄灭的煤火发出的热量。（现在分词作前置定语） ? This result is either from the designer’s particular environment or from the nature of the problem itself.表面磨损或是由滑动面的热应力所引起的，或是由于滑动面疲劳损坏而造成的。 ? This suggests that matter can be converted into energy, and vice versa.这就是说
物质可以转化为能量，能量也可以转化为物质。 ? This system will build on the knowledge and experience gained in developing the
existing suite of software products.这个系统的基础是从开发现有的成套软件产品中所获取的知识和经验。 ? This type of turbine usually rotates at a very high speed, some 20,000 to
25,000r/min.这种汽轮机通常以非常高的速度运转，每分钟约两万到两万五千转。 ? This, too, was something which was completely at variance with the known laws
of nature.这同样完全不符合当时已知的自然法则。 ? Thomas Edison never talked about his own greatness, or seemed to think about it
much. 托马斯·爱迪生从不吹嘘自己有什么了不起，看来也从不多想这种事情。 ? Those nearer the sun are more rocky, those farther away more icy.离太阳越近，
岩石块越多；离太阳越远，则冰块越多。（译为主语） ? Thus when coal is piled too deeply, heat formed by slow oxidation of coal within the pile cannot find a way out and may cause the pile to catch fire of itself.因此，当煤堆得太厚，煤在堆里缓慢氧化而产生的热无法散出，就可能引起煤堆自行着火。 ? Thus work is done when a weight is lifted, or a spring is stretched, or a gas is
compressed in a cylinder.因而当一重物被举起时，或弹簧被拉伸时，或气体在汽缸中被压缩时，也就做了功。 ? Titanium has the strength enough to withstand heavy loads at a high temperature.
钛有足够的强度，在高温下经得起重荷。 ? To develop better mechanical properties is the purpose of many metal working
processes .获得更好的机械性能是对许多金属加工的目的。（顺译法）对许多金属加工的目的是获得更好的机械性能。（倒译法） ? To the everyday bus operator ,battery electric power would seem to offer few specific advantages over the conventional diesel power.对于美日营运的公共汽车运营商而言，由于电瓶提供动力与由一般的柴油机提供动力相比，似乎没有什么明显的优势。
? To transmit electromagnetic waves takes energy.传送电磁波需要能量。 ? To understand better matter and energy in the natural world is the purpose of
chemistry.更好地理解自然界的物质与能量是化学研究的目的。 ? Today’s engines are of much difference from those used in the past.现在的发动
机和过去的有很大的不同。 ? Too large a current must not be used.不得使用过大的电流。
? Turning electric energy into the energy of motion is only part of what the
electromagnet does for us.把电能转换为动能只是我们利用电磁铁的一个方面。 ? Two spacecraft are being launched to probe the atmosphere of Venus.将发射两个
航天器来探测金星的大气层。
?
U
nable to deal with the generator faults, he had to see the chief engineer.由于
处理不了这些发电机故障，他不得不去找总工。
? Under no circumstances can energy be created of destroyed.在任何情况下，能量
既不能创造，也不能消灭。 ? Until the twentieth century man used water, wood and fossil fuels as sources of
power. 在20世纪以前,人们使用水、木材和矿物燃料作能量。 ? Using a person’s voice as an identifier is based on the fact that the geometry of
the vocal tract differ greatly from person to person.利用人的语音来验明身份的依据是每个人声道的几何形状大不相同。（译为主语） ? Using wet procedures also can have qualitative analysis performed.使用湿法也能进行定性分析。
?
V
ariation is common to all plants they reproduce asexually or sexally.变异对
所有的植物，无论是无性繁殖还是有性繁殖都是常见的。
? Velocity changes if either the speed or the direction changes.如果（物体的）速
率和方向有一个发生变化，则其运动速度也随之发生变化。 ? Venus rotates very slowly with the result that its cycle of rotation reaches as long
as 243 days of the earth.金星自转速度极慢，因此它的自转周期长达243个地球日。（动词rotate后增译名词“速度”）
?
W
arm-blooded creatures do not need to depend on the sun for body heat.温
血动物不需要依赖太阳来获得体温。
? Water has no shape of its own. It is not rigid. The same is true of all liquids and
gases.水本身没有形状，它不是刚性的。所有气体和液体都是如此。 ? We assign the plus sign to the branch voltages whose reference direction agrees
with that of the loop.当支路电压的参考方向和回路的参考方向一致时，该支路电压取正。 ? We can get more current from cells connected in parallel.电池并联时提供的电
流更大。 ? We find difficulty in solving this problem.我们觉得难以解决这个问题。 ? We found that women who were normally inactive and then started a program of
moderate exercise showed evidence of iron loss.我们发现，那些通常不运动的女性一旦开始适度的锻炼，就会出现铁离子含量下降的迹象。 ? We have never seen such a powerful motor as it is.我们从未见过像这台发动机
一样具有如此强大动力的发动机。 ? We may picture an atom as made up of a positive nucleus surrounded by electrons.
我们可以设想院子的结构式一个带正电荷的原子核外面围着若干电子。 ? We must reflect what measures to take in case of any accidental collapse of a bed.
我们必须考虑一下如果床层意外崩塌应采取什么措施。 ? We think it important that theory must be combined with practice.我们认为重要
的是理论必须和实践相结合。 ? What a motor does is to change electrical energy into mechanical driving power.
电动机所起的作用就是把电能转化成机械能。 All of the heat lost by the warmer object in cooling is gained by colder object.温度较高的物体冷却时所失去的热量都被温度较低的物体吸收。 ? What a motor does is to change electrical energy into mechanical energy.马达的
作用就是将电能转换成机械能。(what引导主语从句,what在该从句中作宾语) ? What the TV camera does is breaking the picture up into a number of lines consisting of very small points of light.摄像机的功能就是把图像分解成许许多多由微小光点组成的线条。
? What we commonly call metals are in fact not metals but alloys.我们通常称作金属的东西，实际上并不是金属，而是合金。
? What you discovered will be a new rare element.你所发现的可能是一种新的稀
有元素。(what引导主语从句,what在从句中作宾语) ? When a body moves over equal spaces in equal periods of time, the motion is said
to be uniform.当一个物体在相同的时间内移动相同的距离，这种运动被说成是匀速运动。
? When a person sees,smells,hears or touches something,then he is perceiving.当一
个人看到某种东西，闻到某种气味，听到某个声音或触碰到某物时，他是在运用感官在感受。 ? When electrons can move easily from atom in a material, it is a conductor.如果一
种材料其电子能在原子间自由运动，这种材料便是导体。（表示条件） ? When ice changes into water, it does not expand. Instead, it becomes smaller in volume.冰变成水时并不膨胀，相反，体积变小了。 ? When objects are heated they usually expand.物体受热时通常都会膨胀。 ? When oxygen was blown into，bacteria was stimulated to eat the toxic wastes.当
注入氧气后，促使细菌吞噬掉有毒的污物。 ? When the politician or the engineer refers to oil, he almost always means mineral
oil, the oil that drives tanks, airplanes and warships, motor-cars and diesel locomotives.当政治家或工程师一提到油，他们差不多总是指矿物油，也就是可以用来看坦克，开飞机，开军舰，开汽车，开柴油机车的油。 ? When the switch is on, the circuit is closed and electricity goes through.将开关合
上，电路就闭合，而电就接通了。（介词作表语转译为谓语） ? Whenever a curent flows through a resistance , a potential difference exists at the two ends of the resistance.电流通过电阻时，电阻的两端就有电势差。 ? Whenever we can see that a body has the ability to do work we say that the body
possesses energy.每当我们看到物体有做功的能力时，我们可以说该物体具有能量。（that引导宾语从句） ? Where water is lacking, no plants can grow.缺水的地方，植物不能生长。 ? Where 作为连接副词时可引导主语从句、表语从句和宾语从句等，可译为“在什么地方”、“哪里”、“何处”、“何地”等。如： ? Whether or not the speed is constant, the average speed is the distance the body moves divided by the time required for the motion.不论速度是否恒定，平均速度总是物体通过的距离除以运动所需的时间。 ? While heat and work are convertible, the most important thing to know about any
device is its efficiency.既然热和功可以相互转换，那么对于任何机械要了解的最重要的问题就是它的效率。 ? While the moon is revolving around the earth, the earth is also revolving around
the sun.在月球绕着地球旋转的同时，地球也在绕着太阳旋转。 ? While this restriction on the size of the circuit holds, the law is valid.只要电路尺
寸符合上述的限制，这条定律就能适用该电路。 ? Why use metal when you can use plastics？既然可以使用塑料，又何必使用金
属？（表示原因）
? With all its advantages, the accuracy of the new dating method using radioactive
c-14 can’t be blindly trusted.利用放射性碳14测定年代的新方法虽然有种种优点，但是我们可不可盲目相信其准确性。 ? With the more complex shapes, it is necessary to go through a series of stages
before the final shape can be produced from the raw material.对于较复杂的形状，必须经过几个不走才能把原料加工成最后的形状。 ? With the popularity of USB peripherals, it is believed USB interfaces would
become a standard feature for monitors.随着USB外部设备的普及，人们相信USB接口会成为显示器的标准部件。 ? With the same number of protons, all nuclei of a given element may have
different numbers of neutrons.虽然某个元素的所有原子核都含有相同数目的质子，但它们含有的中子数可以不同。 ? Without forces sufficient to overcome the resistance, bodies at rest will never
move.没有足以克服阻力的力，静止的物体决不会运动。 ? Without the laws of motion as a basis, thousands of discoveries and inventions
would have been out of the question.没有运动定律作为基础，就不可能有成千上万的发现和发明。 ? Work must be done in setting a body in motion.使一个物体运动时，必须做功。
（译为宾语）
?
Y
ou can use it to process wastewater effluents, waste solvent streams and
waste oil products.你们可用它处理排放废水、废溶剂以及废油产品。