Happiness is not something ready made. It comes from your own actions.

黑洞不仅仅是破坏性的怪物，它们在塑造星系中起着关键作用。

The nervous system is like an intricate orchestra, with each neuron playing its part.

即使有天下最容易生长的植物,晒它一天,又凉它十天,没有能够长大的。比喻做事一日勤,十日怠,没有恒心,是不会成功的。