数十亿年来，大自然一直是最出色的生物工程师。

The supreme quality for leadership is unquestionably integrity. Without it， no real success is possible， no matter whether it is on a section gang， a football field， in an army， or in an office.

This is the way the world ends, not with a bang but a whimper.

科学是关于理解世界，而医学是关于应用这种理解来帮助人们。

剪辑的魔力在于看不见的过渡。