But economist Jack Strauss says credit conditions threaten the main engine of job growth since two thousand one small businesses.

VOA: special.2009.11.06

So what this says is the efficiency of any reversible engine T1 has to be one minus T2 over T1.

这就是说,任何可逆热机的效率都是,负T2除以。

麻省理工公开课 - 热力学与动力学课程节选

One is our Carnot engine as we've seen it, and the other is just any other reversible engine.

一个是我们已经学过的卡诺热机，另一个是任何一个其它可逆热机。

麻省理工公开课 - 热力学与动力学课程节选

From what we can tell, other than one fire engine distributing water, there's really no presence of any government or other internationalaid groups here.

VOA: standard.2010.01.14

We've formulated one particular kind of engine, and seen how we can analyze what it does, come up with relations that seem of value for efficiency and other quantities.

这是一个很典型的热机，我们来分析它是怎么工作的，然后得到效率和其它一些,有用物理量之间的关系。

麻省理工公开课 - 热力学与动力学课程节选

As we expected, it's less than one, and of course if we build an engine, we want it to be as high as possible, as close to one as possible.

就像预先期待的一样，效率小于一，当然如果我们建造一台热机，我们希望效率越高越好，尽可能接近一。

麻省理工公开课 - 热力学与动力学课程节选