You need energy to move your arms around and move around mechanical systems, obviously, cars, boats, etcetera.

你需要能量,来移动胳膊和走动,机械系统，汽车，船等等。

麻省理工公开课 - 热力学与动力学课程节选

And what we want to say of course is, look, just like it's still your body, even if you break your arm.

因此我们可以说，即便你摔断了胳膊，你的肉体也还是原来的那个。

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