nuclear materials and energy（求文档: 核能利用的利与弊的英语作文）

本文目录

• 求文档: 核能利用的利与弊的英语作文
• 英语中跟电相关的power 和energy 分别是什么

求文档: 核能利用的利与弊的英语作文

　　Nuclear power plants provide about 17 percent of the world’s electricity.Some countries depend more on nuclear power for electricity than others. In France, for instance, about 75 percent of the electricity is generated from nuclear power. There are more than 400 nuclear power plants around the world. 　　To build a nuclear reactor (核反应堆),what you need is some mildly2 enriched uranium(铀). Uranium is a fairly common element on Earth,incorporated3 into the planet during the planet’s formation(形成). U-235 is one of the few materials that can undergo4 induced fission(诱发性核裂变). Raising and lowering the control rods(杆,棒条) allow operators to control the rate of the nuclear reaction.When an operator (操作员) wants the uranium core to produce more heat,the rods are raised out of the uranium bundle(捆,束). To create less heat, the rods are lowered into the uranium bundle.The rods can also be lowered completely into the uranium bundle to shut the reactor down in the case of an accident or to change the fuel. The uranium bundleactsasanextremely high-energy source of heat. It heats the water and turns it to steam. The steam drives a steam turbine(汽轮机), which spins5 a generator(发电机) to produce power. 　　Well-constructed nuclear power plants have an important advantage when it comes to electrical power generation——they are extremely clean. Compared with a coalfired power plant, nuclear power plants are a dream come true from an environmental standpoint (立场,观点). Unfortunately, there are significant problems with nuclear power plants. Mining and purifying(提纯) uranium has not, historically, been a very clean process. Improperly func- tioning nuclear power plants can create big problems. The Chernobyl6 disaster is a good example.Spent fuel from nuclear power plants is toxic (有毒的) for centuries, and, as yet, there is no safe, permanent(永久的) storage facility for it.

英语中跟电相关的power 和energy 分别是什么

柯林斯字典上的解释 power 能量 能源 Power is energy, especially electricity, that is obtained in large quantities from a fuel source and used to operate lights, heating, and machinery. 可见 他们两个指电力时是可以互换的 如果说区别 个人觉得 power 尤其指用来驱动电力设施的,笼统宽泛的 "电力"，energy 更侧重具体的 从材料中获得的 “能源 ”或 “能量 ”比如 能源危机 并不是电力危机 所以用 energy crisis； 能耗，能效 指具体的能量的消耗 ：energy efficiency如果是核能 可以指用于发电的 电力 也可以指核聚变产生的能量 所以 nuclear power 和nuclear energy 都有使用