If we want clean air and water, we must start by protecting our forests.

电影是一种艺术形式，它不仅仅是娱乐，更是对社会现实的反映和批判。

"We have learned to love ourselves, so now I urge you to 'speak yourself.'"

好的计量经济学就像好的木工——关键在于为工作使用正确的工具。

Labor is the source of all wealth and all culture.

This part of my life,this little part is called "happiness".