I forgot to explain that to you. This one is an allowance slip.

我忘了跟您解释，这张是减额单。

youdao

We made a mistake in your bill and overcharged you 120 dollars. So we had to write up an allowance slip and deduct 120 dollars from your bill.

您的帐单上出了个错误，多收了您120元，所以我们要写一个减额单，把这120元从帐单里扣除出来。

youdao

In an attempt to get their son to communicate with them, Abe and her husband have decided that from now on, they are not going to slip an envelope under his door with his' 400 monthly allowance.

尝试着让他们的儿子以后和他们进行交流，阿部秋子夫妇俩决定停止儿子每月400美金的零用钱，那还是夫妇俩用信封装好从儿子的门缝里塞进去的。

youdao