英语翻译
We have discussed your offer of 3% and accept it on the terms quoted.We are prepared to give your product a trial,provided you can guarantee delivery on or before the 20th of September.The enclosed order is given strictly on this condition.We reserve the right of refusal of delivery and/or cancellation of the order after this date.这里面我有很多个地方看不懂.比如说discussed your offer of 3%,还有on the terms quoted；provided you can guarantee delivery on or before the 20th of September.为什么这句要用provided过去式?其他的都是用现在的时态啊...enclosed order is given strictly on this condition这句从enclosed order附在里面的订单...后面就不怎么看得懂了...