讲解文本：

down 失意，低谷，挫败

Life is full of ups and downs.

人生充满着起起伏伏。

He went through a lot of ups and downs.

他经历了很多起起伏伏。

you look so down today, are you ok?

你今天看起来情绪很低落啊，你还好吗?

疯狂练习吧!