The legacy of science is the betterment of humanity.

没有人是自由的，甚至连鸟儿都被天空束缚。

But what is happiness except the simple harmony between a man and the life he leads?

The concept of inflation suggests that the universe underwent a period of extremely rapid expansion shortly after the Big Bang.

如果我们想保护森林，就必须先了解它们。

强者，藐视困难，弱者，仰视困难。