水单的英文：
exchange memo

regional exchange
美国在纽约以外地区的证券交易所

This exchange takes place in the foreign exchange market.
汇兑是在外汇交易市场上进行的。

He gambles on the stock exchange.
他从事股票投机。

Sometimes we exchange with words.
有时我们相互交谈几句。

I'll exchange it for a token.
我给你换个专用辅币。

Send the memo by express mail.
把这份备忘录用快递寄出。

This is a delicately-worded memo.
这是一本措词慎重委婉的备忘录。

He did not comment on the specifics of the memo.
他没有对备忘录的细节置评。

These annoying memos will get short shrift from the boss.
老板不会认真对待这些令人讨厌的备忘录的

If it's an explainable variance memo that's needed, then write one.
如果有必要使用意见分歧备忘录，那么就写下来。