A: What is wrong with your face?

你的脸怎么了?

B: My brother did it.

我哥干的。

A: Why?

为什么?

B: I laughed up my sleeves at him. He’s seen his girlfriend off at the airport and had lipstick on his face and did not know it.

我偷偷地笑他。他到机场为女朋友送行，却不知道脸上留有口红印。