你给我捶背，我替你搔痒。

Scratch my back and I'll scratch yours.

她喘不上气来，不得不让人捶背。

She couldn't get her breath and had to be thumped on the back.

我一共设置了四个奖项，一等奖：给妈妈捶背两百下。

I have set up four award, first prize: give mom back rubs, two hundred.

喜儿：（边给爹爹倒水，边捶背，边回答）是的，爹爹。来过三次了，每次见你不在，又走了。

Hmm, yes, daddy. They has come our home for three times. At every time, they had gone away for your absence.