BUT 用法

We can not do back-value, but to today.

請問這句用法是對的嗎
如果是對的,,那but為何可以這樣用?
更新: 聽公司前輩說,這句在表達文件的日期只能做今天,不能做過去的,
只是我在想,,這句英文是對的嗎
更新 2: 例如押文件日期不能是過去的,只能是今天,
所以就形成了,我們不能做過去的日期,但可以是今天,
如果是你的話,英文怎麼寫
更新 3: 擷取自網路
BACK VALUATION.

A bank that sent a payment may request the bank that received the
payment to back value such payment. Generally, such request is accompanied by
a payment for the amount of compensation owed pursuant to the formula below.

我想表達的是這個
我們無法做BACK VALUATION.但可以是今天,
英文怎麼說?
3 個解答 3