没有人规定你必须永远快乐。

The complexity of viruses reminds us how much we still have to learn about biology.

Will you follow dogma， or will you be original？

过去是一个异国；他们在那里做事的方式不同。

Don't worry about failures, worry about the chances you miss when you don't even try.

我不知道我在做什么，而这就是我喜欢的方式。