商务英语中，付款水单怎么说？

This is to inform you that the payment has been transferred based on the attached bank swift.

释义：这是为了通知您，货款已经转账过去了， 邮箱附件中是付款水单。

赏析一：Transfer ‘转账’

例如：I need to transfer some money to another account. It’s urgent.

我需要将钱转到另一个账号，很紧急。

赏析二： based on在句首， 表示 “根据，基于”的意思。