A penny earned is a penny saved.
你所赚的钱便是省回来的钱。
The P versus NP problem is one of the most important unsolved problems in computer science.
"Russia's destiny is written in the faces of its peasants."
他的诗,如同几何圆规般,画著圆,时而亲密贴近,时而广及全球,唯一不变的是,圆规的尖端总是插定在囚室里。
每一次实验,无论成功与否,都是迈向理解的一步。