mail drop造句

Traditional letter business has lost a lot of clients because of longer transport time , higher cost and required need to post offices or mail drops . many people lost their confidence to letter business
我省的民用信函量逐步萎缩,许多人对信函业务的将来失去信心,那么我省邮政信函业务将如何发展,前景如何呢
It's difficult to see mail drop in a sentence. 用mail drop造句挺难的