我相信儿童书籍应该是美丽的物品，值得珍藏和反复阅读。

不肖：品行不好，不正派。观察他所交往的是些什么人，就能看出他是品德好的人还是不正派的人。

Every challenge in the quarry is an opportunity to innovate.

Genius without discipline is like a ship without a rudder.

"I'd never given much thought to how I would die, but dying in the place of someone I love seems like a good way to go."

除非你决定如此，否则你不会被困在原地。

数学的历史是人类思想和进步的历史。