4.2.Retelling示范精讲（下）

Lecture 4-02.Retelling示范精讲（下）

精讲文章第三段：In the US, you will often hear “tips” called “service charges”.

It is essential to tip in the US, because the waitresses and bar staff are paid a low wage which they cannot afford to live on.

And therefore your tip is much needed by them....