热转换为某一种能而不损失某些东西是不可能的。

It is impossible for heat to be converted into a certain energy without something lost.

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天下上对勇气的最大检验是忍受失败而不损失约心。

The greatest test of courage on earth is to bear defeat without losing heart.

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例如，如果你向上司强调不推行一个项目所带来的损失而不是指出可能带来多少收益，你将会从上司那里得到更多的支持。

For example, you'll get further with your boss if you emphasize the revenue you'll miss out on by not pursuing a project, rather than by citing any potential benefits.

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It's reversible, that means that p external, equals p. I'm doing it very slowly so that I'm always in equilibrium between the external pressure and the internal pressure so I can go back and forth.

我都可以不损失能量，而把过程逆向进行,整个过程中的,每一步都保持平衡,现在我们来分别。

麻省理工公开课 - 热力学与动力学课程节选