解释:既要追悔以往的过失,也要预防将来可能发生的错误。
The most profound discoveries often come from the simplest observations.
许多人认为他们在思考,实际上只是在重新整理他们的偏见。
In mathematics, you don't understand things. You just get used to them.
我们都是在一艘叫做地球的小宇宙飞船上的宇航员。