We'll pay by T/T within 14 work days against the shipping document.请问Against 是不是凭.的意思?

问题描述:

We'll pay by T/T within 14 work days against the shipping document.请问Against 是不是凭.的意思?
还有这句的翻译

此句话应该是:收到装运文件后14个工作日内电汇付款. against 应该理解为对方提交的含义.