你爱的人越多，你的弱点就越多。
The more people you love, the weaker you are.
Natural experiments can provide valuable insights into economic questions.
警惕物质诱惑，保持内心独立。
The most dangerous thing is to be alive. But it is also the most beautiful.
数学的美在于它能够用一种超越文化和语言障碍的语言来描述宇宙。
A picture must be grasped at once, as a whole, like a piece of music or a poem.