或是物理问题集合,又或者是高中的物理实验室，我们对这些问题都有确切的答案，或者你可以把你的实验结果改成正确的，有些事情是不能明确界定的。

And so this is not like a math problem set or a physics problem set. Or, like a high school physics lab, where we all know what the answer should be, and you could fake your lab results anyway.

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物理学是一门实验科学，许多物理规律、物理定律都要通过物理实验来证明和验证。

Physics is an experimental science. Many physical rules and laws ought to be proved and tested through physical experiments.

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这与物理学所遇到的情况是一样的，物理学所进行的实验也不是绝对的实验。

This with physics meets the conditions are the same, the physics experiment is not absolute experiment.

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Chemistry and biology, physics has the advantage that the desktop experiments can do are relatively straight forward than not dangerous.

化学和生物的话，物理有一个好处就是,桌面实验能做到,直观却不危险,地反映结果。

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He was a professor of physics at Cambridge University, and he was also the director of the Cavendish Laboratory.

他是剑桥的一名物理教授，他还是,卡文迪许实验室的主任。

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That tells us the direction of spontaneous change for ordinary processes, chemical processes, mixing and you name it, under conditions that are easy to achieve in the lab.

这个物理量告诉我们在实验室,能够实现的条件下通常的过程，化学过程，混合以及你所能想到的过程，自发进行的方向。

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