绿叶鸟网（www.lvyeniao.cn）原创整理的 > 英语四级作文 How to Sort Letters
First of all, letters and packets are collected ii1 bags from pillar boxes, post offices and firms, in post office vans. They are then taken to the sorting office, where the bags are emptied and the letters separated from the packets. Following this step, the letters are put through machines so that the stamps can be cancelled (盖销). In this process the date and place of sorting are put over the stamps on each envelop. In the next stage, the sorting of the letters takes place, according to the country they are addressed to. This is done by placing them in the appropriate pigeon hole (鸽笼式分类架). Sebsequently, the letters are taken from the pigeon hole and placed in baskets, which are then put onto a conveyor belt. While on this conveyor belt, the baskets are directed to the appropriate secondary sorting section by means of coding pegs. At the secondary sorting frames, the letters are put into towns in the country Later, the letters are tied in bundles and a label is put on showing the towns they are addressed to. Finally, the letter bundles are placed in bags, which have the post office seal, post office railway number and destination code number on them, and then these are sent to the railway station.
[点评]
这是一篇典型的描述过程的文章。文章从头到尾用了许多顺序转接词，清楚、连贯地描述了信件分类的过程。
[参考译文]
如何进行信件分类
首先，邮局的邮车从邮筒、邮局或公司把信件和包裹用袋子收集起来，然后送到分类室。在这里，袋子倒空，信和邮包给分开。接下来，将信放在机器里盖销邮票。这个过程中，分类的时间和地点就印在邮票上了。下一步，根据信所寄往的国家进行分类，放入鸽笼式分类架。随后，信件被取出，放进篮子里，送上传送带。上了传送带后，篮子根据标码钉被送往再次分类部。在这些再次分类框架上，信按照这个国家的各个城市被分开。再下来，信件被扎成捆，贴上要寄往城市的标签。最后，信件捆被装进袋子，袋子上盖有邮戳，标上邮局铁路号码和目的地的邮政编码，然后送往火车站。
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