The temporary can become permanent if it serves people well.

数学研究是所有智力和精神进步不可或缺的基础。

Perception is an active process where the brain constructs meaning from sensory input.

I don't believe in luck, I believe in preparation.

The law, in its majestic equality, forbids the rich as well as the poor to sleep under bridges, to beg in the streets, and to steal bread.