Correct or improve the translation of the following English sentences.原文：Terms of payment are subject to agreement in each case. 译文：支付的期限受不同情况的制约。改译：

Correct or improve the translation of the following English sentences.原文：Terms of payment are subject to agreement in each case. 译文：支付的期限受不同情况的制约。改译：

付款条件以每一项交易的协议为准。