化学是一门奇妙的科学，但一个人不应该完全投身于其中。
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.
We cannot be sure of having something to live for unless we are willing to die for it.
The Belt and Road construction should adhere to the principle of extensive consultation, joint contribution and shared benefits.