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When I am facing a lot of pressure at work, my back and neck will start to hurt.
VOA: special.2010.01.24
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Because it's so important. And I should add and also under reversible work, where the external pressure is equal to the internal pressure.
而且我还要说应该在外部压强,和内部压强相等的,可逆过程中引入它。
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And he's seen me work under pressure.
而且他见过我如何在压力下工作。
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But many also say they do not have enough time to do the work themselves and are under great pressure to do well in school.
VOA: special.2009.04.23
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So for the reversible process, the work done is the integral under the pressure volume state function, the function of state.
对可逆过程，做的功,是压强体积态函数曲线下，的积分面积。
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But in eighteen thirty-seven, the pressure of the work caused his health to suffer.
VOA: special.2009.02.25
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Black Boy We started this course talking about Black Boy - and the way that a whole world of pressure-- pushed on the borders of that work and actually changed its very material form.
在开始这门课的时候我们先讨论了,说了这个充满政治压力的种族矛盾激化的世界-,并且已经改变了,它的实体范畴的。
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"Anti-extremism legislation has been used to pressure an environmental NGO to stop work on environmental issues,"
VOA: standard.2009.08.04
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Because we did work at constant pressure, and so it's just volume difference times pressure.
因为是在恒压下做功，所以功就等于体积变化乘以压力。
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And so, again, we see a temperature increase, and we know the work, and the temperature increase, it's a constant pressure thing.
好，我们看到温度升高了，然后我们有做功量和温度的升高量，这是一个恒定压力下的值。
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And there is no work done on the surroundings because pressure is zero.
这里系统没有对环境做功,因为压强是零。
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So if delta v is negative, in this case delta v is negative, OK, delta v is negative, pressure is a positive number, negative times negative is positive, work is greater than zero.
也就是当活塞,压缩气体的时候，做的功是正的，按照这一规定,我们需要在这里，加上一个负号，这是习惯规定。
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I also want to assume for our present purposes that there's only pressure volume work going on, which is to say I want to put pdV p dV in here minus p dV for dw.
同时假定,对于我们目前的目的而言，只有压强做功这就是说,我要把这里的dw替换为负。
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The pressure is going to decrease along the way, but it's going to have to do more work So the majority in this case is right.
根据这个式子，做的功,因此多数派是正确的。
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And the cycle it's going to undertake is called a Carnot cycle, and it works the following way: we're going to do pressure volume work.
它的循环过程,叫做卡诺循环，过程如下：,这是个压强体积系统。
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So expansion work, for instance, or compression work, is if you have a piston with a gas in it. All right, you put a pressure on this piston here, and you compress the gas down. This is compression work.
力乘以距离，就是功，功有许多种：,电可以做功,驱动电机与电风扇,磁力也可以做功。
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