酸和碱是互补的；没有另一个，一个就无法存在。

The past is always with us, and it's always more complicated than we think.

The question you should be asking isn't, 'What do I want?' or 'What are my goals?' but 'What would excite me?'

我相信科学具有改善人类生活的巨大潜力。

进步不仅仅是向前迈进，而是一起向前迈进。