The power plant is the heart of a ship. 动力装置是船舶的心脏。动力装置是船舶的心脏。
The power unit for driving the machines is a 50-hp induction motor.
驱动这些机器的动力装置是一台50马力的感应电动机。马力的感应电动机。
Semiconductor devices, called transistors, are replacing tubes in many applications. 半导体装置也称为晶体管，在许多场合替代电子管。在许多场合替代电子管。
Cramped conditions means that pasngers ’ legs cannot move around freely.
空间狭窄，旅客的两腿就不能自由活动。旅客的两腿就不能自由活动。
All bodies are known to posss weight and occupy space. 我们知道，所有的物体都有重量并占据空间。 The removal of minerals from water is called softening. 去除水中的矿物质叫做软化。去除水中的矿物质叫做软化。
A typical foliage leaf of a plant belonging to the dicotyledons is compod of two principal parts: blade and petiole.
Einstein ’s relativity theory is the only one which can explain such phenomena.放疗后的副作用有哪些
All four (outer planets) probably have cores of metals, silicates, and water.
王玉真The designer must have access to stock lists of the materials he employs.
设计师必须备有所使用材料的储备表。设计师必须备有所使用材料的储备表。
Part adjustment and repair must be performed on regular basis if an acceptable printed product is to be the end product.
The most important of the factors affecting plant growth is that it requires the supply of water. 植物生长的各因素中最重要的是水的供应。植物生长的各因素中最重要的是水的供应。
The doctor analyzed the blood sample for anemia. 医生对血样作了分析，看是不是贫血症。看是不是贫血症。
The apparent change in size of the sun is caud by dust in the air near the horizon.
太阳的大小看起来有变化，这是由于靠近地平线的空气中有尘粒而引起的。这是由于靠近地平线的空气中有尘粒而引起的。
The fragments of rock and iron range from thousand kilometers in diameter to less than one. 这些石块和铁块的碎片大小不等，大的直径有1000公里，小的不到1公里。公里。
Manufacturing process may be classified as unit production with small quantities being made and mass production with large numbers of identical parts being produced.
制造过程可以分为单件生产和大量生产。前者指的是生产少量的零件，后者则是指生产大量相同的零件。件。
Cartography is the science of making maps.
Many elements in nature are found to be mixtures of different isotopes.
人们发现自然界里许多元素都是各种不同的同位素的混合物。人们发现自然界里许多元素都是各种不同的同位素的混合物。
The two units ud most frequently in electricity are ampere and volt: this is the unit of voltage and that of current.
电学上最常用的两个单位
That like charges repel but opposite charges attract is one of the fundamental laws of electricity.
Almost any insulated body process to some extent the ability to retain for a time an electric charge. 几乎任何一种绝缘体都多少具有保留电荷一段时间的能力。几乎任何一种绝缘体都多少具有保留电荷一段时间的能力。 The angular contact bearing provides a greater thrust capacity.
向心推力轴承有较大的轴向承载能力。向心推力轴承有较大的轴向承载能力。
The properties of the weld can be altered by varying the grain orientation.
通过改变晶粒的方向可以改变焊缝的性通过改变晶粒的方向可以改变焊缝的性
The spindle rotates simultaneously round two axes at right angles to each other.
锭子同时绕两个互相垂直的轴旋转。锭子同时绕两个互相垂直的轴旋转。
The earth isn ’t completely round; it is slightly flattened at the poles.
In each round of operation the particle picks up energy from the oscillating electric field.
粒子每运转一周都从振荡电场获取新的能量。粒子每运转一周都从振荡电场获取新的能量。
An electron is an extremely small corpuscle with negative charge which rounds about the nucleus of an atom.
电子是绕原子核转动且带有负电荷的极其微小的粒子。电子是绕原子核转动且带有负电荷的极其微小的粒子。
Rate of penetration was found to be proportional to the net pressure applied by the tool.
人们发现钻孔速度与工具所受的净压力成正比。人们发现钻孔速度与工具所受的净压力成正比。
Scientists are constantly striving to find fast and convenient way of obtaining quantitative data. 科学家们总是力求找到快速而简便的方法获得定量数据。科学家们总是力求找到快速而简便的方法获得定量数据。
To find the area of a square or oblong, you merely multiply its length by its width. Certain isotopes are not found in nature.
求一正方形或长方形的面积，你只需将其长度乘以宽度。有些同位素在自然界中并不存在。你只需将其长度乘以宽度。有些同位素在自然界中并不存在。 New fibers find expanding applications in engineering and industry. 新发明的纤维在工程和工业领域得到越来越广泛的应用。新发明的纤维在
工程和工业领域得到越来越广泛的应用。
Kangaroos are found in Australia. 大袋鼠产于澳大利亚。大袋鼠产于澳大利亚。
This plant is found in the a near the mouth of rivers. Microcomputers have found their application in the production of genius nsors.
这种植物生长在近河口的海中。微型计算机已经应用于智能传感器的生产中。这种植物生长在近河口的海中。微型计算机已经应用于智能传感器的生产中。
Plastics find wide application in our daily life. 塑料在我们的日常生活中得到广泛应用。塑料在我们的日常生活中得到广泛应用。
The cau of rolling resistance is the deformation of mating surfaces of the rolling element and the raceway on which it rolls.
滚动阻力的起因在于滚动体的配合面和它滚动的滚道的变形。滚动阻力的起因在于滚动体的配合面和它滚动的滚道的变形。
Traditionally, NC programming has been performed offline with the machine commands being contained on a punched tape.
通常，数控机床的编程是脱机完成的指令载于穿孔带上。数控机床的编程是脱机完成的指令载于穿孔带上。
The occurrence of large mats of floating algae may result in the death of many fish from lack of oxygen. 大片大片漂浮的藻类的出现导致很多鱼因缺氧而死亡。大片大片漂浮的藻类的出现导致很多鱼因缺氧而死亡。
The splitting of the uranium or plutonium nucleus is accompanied by the relea of very considerable amount of energy.
随着铀核和钚核的裂变，会有极其巨大的能量释放处理。会有极其巨大的能量释放处理。
斓曦演过的电视剧
爵士歌王The major contributors in component technology have been in the miconductor.
The distance between the two plates is small compared with their linear dimensions.电饭锅做饭
两板之间的距离相对于其宽度和长度而言比较小。两板之间的距离相对于其宽度和长度而言比较小。 Just as different solids and liquids vary in density, so do gas and vapor.
正像不同的固体和液体的密度不同一样，不同的气体和蒸汽的密度也不同不同的气体和蒸汽的密度也不同
The Curies believed that there was something in nature that gave out radiation.
居里夫妇坚信，自然界中有一种物质能放出辐射能自然界中有一种物质能放出辐射能
Obviously, there is much room for the improvement in the structure. 显然，其结构还有较大的改进余地。其结构还有较大的改进余地。 At prent coal is the most common food of a steam plant. The facts have been t down in black and white. Each time a sample was drawn for color determination. 每次取一个标本测定颜色。每次取一个标本测定颜色。
What is certain is that the oil spill has delivered a devastating blow to the ecology of the Persian Gulf. 可以肯定，这场石油泄漏事件对波斯湾的生态是个惨重的打击。这场石油泄漏事件对波斯湾的生态是个惨重的打击。
We should get familiar with different systems of units. 我们应该熟悉各种计量单位制。我们应该熟悉各种计量单位制。 The decision-making process are applicable to the entire field of engineering design--- not just to mechanical engineering design.
这些判定过程可以应用于工程设计的整个领域，而不仅仅限于机械工程设计。而不仅仅限于机械工程设计。
Hydrogen instead of air is frequently ud for cooling large turbogenerators.
常以氢气代替空气来冷却大型汽轮发电机。常以氢气代替空气来冷却大型汽轮发电机。
When the war was over, it was discovered that the Germans were nowhere near success in developing nuclear weapons.
第二次世界大战结束后，人们发现德国人在研制核武器方面离成功还很远。人们发现德国人在研制核武器方面离成功还很远。
Various precautions have been taken against leakage. 已采取了各种措施防止渗漏。已采取了各种措施防止渗漏。
Once inside the oven, panels are subjected to a temperature of 365°F .
一旦进入烘干炉，板材就处于365华氏度的温度条件下。华氏度的温度条件下。
Value is defined as a numerical ratio, the ratio of the function, or performance, to the cost.
价值的定义是功能或性能与成本的数值比。价值的定义是功能或性能与成本的数值比。
This new model should appeal to potential buyers. 这种新式样对潜在的买主肯定有吸引力。这种新式样对潜在的买主肯定有吸引力。 Galileo ’s experiments are not difficult, nor is there any evidence that he performed them with exceptional skill. 也没有证据表明他是以非凡的技能来做实验的。也没有证据表明他是以非凡的技能来做实验的。
Sometimes a scientist obrves an object and its features, for example a star or a bird; sometimes he obrves an event, which is something that happens at a particular time.
有时科学家观察一物体及其特征，例如一颗星或一只鸟，有时科学家观察某一事件，即在一特定时间所发生的事。发生的事。
Earthquakes are generally more destructive of life than volcanic eruptions. 地震对于生命的破坏通常大于火山爆发。地震对于生命的破坏通常大于火山爆发。
Heat should be applied slowly to avoid localized overheating. 应当慢慢加热，以避免发生局部过热现象。以避免发生局部过热现象。 How rapidly a fuel burns depends on how thoroughly it is mixed with oxygen or air.
一种燃料燃烧的速度有多快，取决于它与氧气或空气混合的均匀程度。取决于它与氧气或空气混合的均匀程度。
This is why a coil is often referred to as an inductor. 这就是线圈常被叫做电感器的原因。这就是线圈常被叫做电感器的原因。 Practically all of the uful properties of materials are strongly dependent on their internal structure. 几乎材料的一切有用特性都与其内部的结构有密切的关系。几乎材料的一切有用特性都与其内部的结构有密切的关系。
The metal casts well. 这种金属有良好的铸造性能。这种金属有良好的铸造性能。
A wire for conducting electric current is covered with plastic; the plastic is insulation round the wire. 传导电流的导线包有塑料，该塑料便是导线周围的绝缘材料。该塑料便是导线周围的绝缘材料。
There are many ways of determining the distribution of the magnetism about a magnet.
有许多方法来确定磁场周围的磁力分布状况。有许多方法来确定磁场周围的磁力分布状况。
Good lubrication keeps the bearings from being damaged. 润滑良好可保护轴承不受损伤。润滑良好可保护轴承不受损伤。
Safety in a power plant is of great importance. 安全在电厂是非常重要的。安全在电厂是非常重要的。
Most modern transmitters employ solid state circuits. 现代发报机大多采用固体电路。现代发报机大多采用固体电路。
E-Chemmerce now offers two main levels of online business intelligence on chemical, plastic and energy e-commerce.
《电子化工商务》目前主要提供两个层次的有关化学、塑料和能源电子商务的在线商务信息服务。 The images tend to exaggerate the robot ’s similarity to human anatomy and behavior.
这些概念常常夸大了机器人与人类在形体和行为方面的相似之处。这些概念常常夸大了机器人与人类在形体和行为方面的相似之处。
Aluminum remained an expensive rarity till the discovery of the electrolytic process for reducing aluminum in 1886.
直到1886年人们发现电解法还原铝之前，铝一直是一种昂贵的珍品。铝一直是一种昂贵的珍品。
Since some materials are not damaged easily as others, the possibility exists of developing
radiation-resistant parts.
由于有些材料不像另一些那样容易
This action externally appears like the discharge of a capacitor. 这一作用从外表上看来像电容器的放电现象。这一作用从外表上看来像电容器的放电现象。
Once out of the earth ’s gravity, an astronaut is affected by still another problem--- weightlessness.
——失重。——失重。
By minimizing the microscopic imperfections scientists are making far stronger ceramics.
科学家们正通过最大限度地减小微观缺陷来制造强度高得多的陶瓷。科学家们正通过最大限度地减小微观缺陷来制造强度高得多的陶瓷。
Atomic cells are small and very light, as compared to ordinary dry ones.
和普通电池相比，原子电池体积小、重量轻。原子电池体积小、重量轻。
Transistors can make previously large equipment much smaller.
晶体管能使原先体积大的设备变得小得多。晶体管能使原先体积大的设备变得小得多。
Astronomers have evidence of a few other stars too, which might have black holes as companions. 天文学家有证据表明，还有其他一些恒星也可能有黑洞作为伴星。还有其他一些恒星也可能有黑洞作为伴星。
The key to the new materials is rearchers ’ increasing ability to manipulate substances at the molecular level.
开发新材料的关键在于研究人员不断提高在分子一级上处理物质的能力。开发新材料的关键在于研究人员不断提高在分子一级上处理物质的能力。
The largest and most expensive products cannot, becau of their size, be testable in the factory. 最大最贵的产品因为体积大，在该工厂里是不能检验的。在该工厂里是不能检验的。
Cold rolling enables the operators to produce rolls of accuracy and uniformity, and with a better surface finish.
冷轧可使操作工生产出精确度高、均匀度好的轧制件，并具有更好的表面光洁度。并具有更好的表面光洁度。
All the factors play a key role in formulation of the model.
在拟订模型时，所有这些因素都将起到关键性的作用。所有这些因素都将起到关键性的作用。
PCs are not the most stable, and with video editing you have to be extra careful. 个人电脑一般并不太稳定，所以，进行视频编辑时需要加倍小心。进行视频编辑时需要加倍小心。
This method makes it easy to identify the various components.
这个方法使人们很容易识别各种不同的构成成分。这个方法使人们很容易识别各种不同的构成成分。
It was estimated that the power of an average hor is equal to 500 feet-pounds per cond.
水稻育秧
据估计，一匹普通马的功率等于500英尺-磅力/秒。秒。 Panel patch is one gauge heavier than thickness of original skin. 补块比原板的厚度大一号。补块比原板的厚度大一号。
Studies have shown that information can be communicated to people many times faster in a graphic form than in written form.众多研究表明，以图形表示的信息被人们接受的速度比以文字表示的快许多倍。以图形表示的信息被人们接受的速度比以文字表示的快许多倍。 The chemist is making an analysis of the poison. 药剂师正对毒性进行分析。药剂师正对毒性进行分析。
It appears that the construction of the dam has had a considerable effect on the ecology of the regio
n. 看来，建造水坝对这一地区的生态已经有相当大的影响。建造水坝对这一地区的生态已经有相当大的影响。
The receiver will operate reliably no matter what happens.
炒毛肚
Radiant, electrical and chemical energies can all be turned into heat.
辐射能、电能和化学能这三种能均可转变为热能。辐射能、电能和化学能这三种能均可转变为热能。
The frequency, wave length and speed of sound are cloly related. 频率、波长和声速三者是密切相关的。 Noi figure is minimized by parametric amplifier.采用参量放大器即可将噪音系数减小至最低限度。采用参量放大器即可将噪音系数减小至最低限度。 In the abnce of sufficient knowledge confusion exists in classifying a specimen as a butterfly or a moth. 如果没有足够的知识，就分不清标本是属蝶类还是蛾类。就分不清标本是属蝶类还是蛾类。
Lead can be hammered into very thin sheets without being broken. 铅能被锤成很薄的薄片而不破裂。铅能被锤成很薄的薄片而不破裂。 There are a number of devices that give an electric current when light falls on them, without any chemical changes taking place. 有许多器件在受光照射时能产生电流，但不发生任何化学变化。但不发生任何化学变化。
The fact that the concrete is slow in tting is no sign that it is of poor quality.
混凝土凝固得慢并不表示其质量差。混凝土凝固得慢并不表示其质量差。
Such an engine is called an internal combustion engine. 这种发动机成为内燃机。这种发动机成为内燃机。
The symptoms of hepatitis are similar no matter which virus is involved.
肝炎不管是由何种病毒引起的，其症状均大同小异。其症状均大同小异。
This critical deficiency was itlf due to three factors which interacted with each other over the entire period. 这个关键性的逆差来源于三个始终互相影响的因素。这个关键性的逆差来源于三个始终互相影响的因素。
The properties change in going from carbon to graphite.碳转变成石墨时，其性质也发生了变化。其性质也发生了变化。 The design choices hinge upon considerations of gain, noi figure, and so forth.
设计选择的关键在于考虑增益、噪音系数等等。设计选择的关键在于考虑增益、噪音系数等等。
Temperatures may reach 700°C and surface oxidation becomes critical.
温度高达700
If the atomic nucleus of a heavy element is split, a large amount of energy is relead.
分裂一重元素的原子核，会释放出很大的能量。会释放出很大的能量。
The discovery of enzymes is very important becau it gave impetus to a ries of experiments. 酶的发现很重要，因为它推动了一系列试验的进行。因为它推动了一系列试验的进行。
Apart from the fact that it may become hot, no apparent change occurs in a metal when it is carrying a current.
大学英语b级金属有电流通过时，除了金属可能变热外没有什么显著变化。除了金属可能变热外没有什么显著变化。
This equipment forms an integral part of many advanced systems.
这个设备是许多先进系统不可缺少的一部分。这个设备是许多先进系统不可缺少的一部分。
There was a ri in temperature, and as a result, the component failed. 温度升高了，结果元件出了故障。结果元件出了故障。 If there is little cooling water available, a diel engine makes an excellent prime mover for generation below 10,000 kV below 10,000 kVA. A.
10000千伏安以下的原动机。千伏安以下的原动机。
There was a block in the pipe and the water could not flow away. 水管被东西堵住，水流不出去。水流不出去。 The properties of gas are quite different from tho of liquid. 体的性质与液体的性质大不相同。体的性质与液体的性质大不相同。 The electric resistance of copper is not so large as that of iron. 铜的电阻不像铁的电阻那样大. The three gas laws are true of all gas, as well as of air.气体三定律不但适用于空气，也适用于所有气体。也适用于所有气体。 Matter changes not only in state but also in volume. 物质不仅形态改变而且体积也改变。物质不仅形态改变而且体积也改变。
Continuous data can be expresd in either fractions or whole numbers.
连续资料可以用分数表示, In an unusual application, this organization us a fingerprint scanner to monitor the comings and goings of its residents.
一个不同寻常的用途是，这个机构使用指纹扫描器监视居住人员的进出。这个机构使用指纹扫描器监视居住人员的进出。
A capacitor is ud to eliminate sparking when a circuit containing inductance is suddenly opened. 当含有电感的电路突然断开时，可用电容器消除火花。可用电容器消除火花。
The comparison reveals that the error is due to aliasing. 比较结果表明，误差是由于名称不同而造成的。误差是由于名称不同而造成的。 The scans confirmed that the subjects ’ brains dealt with words in ways that contradict one hoary old idea. 扫描结果证实，受试者的大脑处理词的方式同一种古老的旧观念不一致。受试者的大脑处理词的方式同一种古老的旧观念不一致。
The latest rearch with radioactive isotopes has shown that this assumption is quite wrong.
对放射性同位素的最新研究结果表明，这种设想是完全错误的。这种设想是完全错误的。
Metals differ in the ea with which they give up electrons and enter into chemical combination. 各种金属放出电子和参与化学反应的难易程度不一。各种金属放出电子和参与化学反应的难易程度不一。
Internal-shoe drum brakes provide better protection from water and dust.
内蹄式鼓形制动器的防水、防尘性能比较好。内蹄式鼓形制动器的防水、防尘性能比较好。
People on earth are protected from the dangerous ultraviolet radiation of the sun by a layer or ozone that spans the planet and absorbs the radiation. 地球上的人们受到包围着地球并能吸收辐射的一层臭氧层的保护，从而免受危险的太阳紫外线辐射的伤害。伤害。
According to the molecular theory the temperature of an object depends on the average speed of its molecules.
根据分子理论的原理，物体的温度取决于其分子的平均速度。物体的温度取决于其分子的平均速度。
Effectiveness of temperature control depends upon the amount of lubricant supplied, the ambient temperature, and the external cooling.
温度控制的效果取决于润滑剂的用量、环境温度以及外部的冷却设施。温度控制的效果取决于润滑剂的用量、环境温度以及外部的冷却设施。
