History does not long entrust the care of freedom to the weak or the timid.

The interplay between chemistry and biology is what makes life so fascinating.

在没有生命力的帮助下合成尿素是我们这个世纪最重要的发现之一。

领导力是关于今天做出艰难的决定，这些决定将使后代受益。

The power of mathematics is in its abstraction, allowing us to see patterns and connections that are not immediately obvious.

The best way to scale a program is to scale it.

像我们这样的人在这样的情况下，我们必须确保他们看到我们。