过去是一个陌生的国度；那里的人做事方式不同。
The past is a foreign country; they do things differently there.
I always try to push myself to do something different.
Every man over forty is responsible for his face.
我的科学劳动给我带来了极大的满足，我深信不久之后整个世界都会承认这些劳动的成果。
我不是榜样，我只是个在摸索的人。