数学的本质在于它的自由。

亲代投资是理解性别差异起源的关键。

And never would they make a mistake in the order of their entry upon the stage. It would be magnificent.

生命短暂，必须充分利用。

If you're not making mistakes, you're not trying hard enough.

物理学的美丽在于它能够用简单的原理解释复杂的事物。