修改合同怎么说？

Kindly elaborate for my understanding as I am not aware of any amendment to be made on the PO.

释义：我不知道采购合同上需要做什么修改，请详细说明下以便我能理解。

赏析一：elaborate “详细说明”

例句：That's an interesting idea, would you care to elaborate?

这是一个有趣的想法，你愿意详细说明一下吗？

赏析二：amendment ‘修改；修正案”

例如：This amendment makes the law more unworkable.

这一修正案使得该法律更加行不通。