-
You take fuel, rather you take something that's warm, and you put it in contact with the atmosphere, it cools down.
改变约束,继续加热,气体膨胀。
-
In the meantime, I believe that the U.S. is doing quite a bit of work in terms of raising fuel efficiency standards,
同时，我相信美国在提高燃料效率标准方面做了不少事，
-
All right, so I'm burning some energy, I'm burning some fuel to do this somehow, to get that work to happen.
而这个路径需要先加热再冷却，这样，我需要能量来源，比如燃料，来完成做功。
-
And, we'll talk about fuel cells later in the semester when we do the unit on redox reactions and electrochemistry.
这学期我们随后会讨论燃料电池,当我们讲到,关于氧化还原反应和电化学单元时。
-
Or this community that doesn't have safe drinking water so regularly children die of diarrhea because they cannot afford to treat their water, they don't have the fuel to boil their water or something.
可能还有这样一个地方，那里没有安全的饮用水,孩子们时常死于痢疾,因为他们拿不出钱对水进行处理，也没有燃料来把水烧开。
-
But Manifest Destiny was in some ways the fuel of the American imagination.
但是命运天定在某种程度上,丰富了美国人的想象力
-
So, fuel economy and environmental conservancy make a lot of sense if you care about such things, of course.
所以，油价和环境保护,是很有意义的,如果你关心这样的事，当然会更好。
-
So, people are talking about the use of hydrogen in fuel cells.
人们在讨论,如何把氢用在燃料电池中。
-
You take your fuel, you heat it up again.
然后移开热源。
-
And, you've undoubtedly heard a lot in the public press, and even in the political dialogue such as it is these days that hydrogen might be on environmentally friendly fuel.
毫无疑问你已经在公开新闻上，甚至在政治的对话上听到过了,比如最近这些天,氢气是一种环境友好的燃料。
-
Clearly, if I did nothing more, but I took every car, doubled its fuel economy, its emissions would go to 50% of what they are now, no other changes being made.
显然，如果我什么也不做，但是我把没量车的汽油价加倍，汽车废气排放量就会是现在的一半了，别的不会有什么改变。
-
It's biological engines, right. Things that either produce or consume biological fuel to do different sorts of processes. Also, of course of key importance to understand what the, in that case, biological thermodynamics are.
但不只是我们制造的引擎,生物引擎也是如此,它们产生或消费生物燃料,来完成不同的过程，当然，这也是理解生物热力学的关键所在。
应用推荐