翻译下面的一封商务英语信函,注意使用正确规范的语言。 Dear Sirs, We thank you for your promptness in delivering the coffee we ordered on 20th, July. The number of bags delivered by your carrier this morning was, however, 160 whereas our order was for only 120. Unfortunately, our present needs are completely covered and as we cannot make use of the 40 bags in excess of order, we have put them in our warehouse to be held for you until we receive your instructions. Yours Truly,