Remember, if you ever need a helping hand, it's at the end of your arm, as you get older, remember you have another hand: The first is to help yourself, the second is to help others.

Be a good ancestor. Do something a future generation will thank you for. A simple thing is to plant a tree.

I'm not perfect, but I'm always me.

化学是连接微观世界和我们日常所见现实的桥梁。