"The immune system is like a double-edged sword; it can fight cancer but also needs to be controlled."

观察他交往的是什么人，就能知道他的品行如何。

Sometimes the simplest melodies carry the deepest emotions.

在拉丁美洲，现实总是超越虚构，但我们的责任是努力接近它。

Optimism is a learned skill. Once you learn it, you can improve your life in every way.

世界是一片伟大的海洋，我们是其中的水手。