气候变化的挑战是我们这个世纪的战斗。

A dreamer is one who can only find his way by moonlight, and his punishment is that he sees the dawn before the rest of the world.

No nation can prosper without cooperation between its farmers and its industrial workers.

The only way to do great work is to love what you do.

You must trust and believe in people, or life becomes impossible.

价的概念是理解分子结构的关键。