Retroactive Payment 什么含义

Discover payment什么意思 contactless payment什么意思 payment invoincing and payment什么意思 initial payment和down payment有什么区别呀? ach payment和wire payment各是什么意思?有什么区别? payment terms 和payment methods到底有什么区别! payment batch currency具体什么意思, Modes of payment中文什么意思 payment,wage,salary有什么区别? 翻译collect payment 什么意思 结合句子 down payment这短语什么意思?