商务信函在商业贸易中扮演着重要的角色，他的特点和功能决定了商务信函中必须注重礼貌原则的运用。
Business letters play an important role in business trade. Because of its characters and functions, in business letters, politeness should be paid more attention.
本文首先对国际贸易的定义和功能进行简单介绍，对国际贸易的发展趋势进行了简单分析。
This paper introduces simply the concept and feature of international trading market, presents ordinary analysis on its trend in the future.
上世纪90年代开始，国际港口功能正从交通运输枢纽、水陆联运咽喉向国际贸易综合运输中心和国际贸易物流中心等多功能方向拓展。
Early in the 1990s, international ports have converted from land-and-water coordinated transport hubs into comprehensive trading centers and international logistics centers.
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