With a library you are free, not confined by temporary political climates. It is the most democratic of institutions because no one - but no one at all - can tell you what to read and when and how.

Singing is about expressing what cannot be said in words.

科学是一项集体事业，每一代人都为之添砖加瓦。

不要害怕犯错，但要快速从中学习。