过去总是紧张的，未来是完美的。

我不敢说自己从未担心害怕过。 实际上我希望少一点担心害怕，因为它让我分心，使我焦虑。

The library is inhabited by spirits that come out of the pages at night.

The power of abstraction is that it allows us to ignore irrelevant details and focus on the essential aspects of a problem.

研究中最大的回报是知道你的工作可以拯救生命。