让中国人吃饱饭是我们这代科学家的使命。
It is our mission as scientists of this generation to ensure Chinese people have enough to eat.
People believe in God because the world is very complicated and they think it is very unlikely that anything as complicated as a flying squirrel or the human eye or a brain could happen by chance.
Making something is really hard. You have to care about it so much that you will push through all the disappointments and frustrations.