The study of mathematics is like air or gravity—it is everywhere, and you can't see it, but you know it's there.

DNA分子是所有生命的基础，理解它就是理解生命本身。

Every woman deserves to be treated with respect and dignity.

Memory is not just a personal matter; it is also a collective one.

粮食是百姓生存的根本，没有粮食人就无法生存。三天不吃粮食，父子之间也难以互相照顾。