商务英语信函是国际商务活动的重要手段。
English business letters are important means for international business activities.
进出口是大多数国家最重要的国际商务活动。
For most nations, exports and imports are the most important international business activities.
全球的主要贸易国都根据WTO协议进行国际商务活动。
The world's major trading nations use WTO agreements to do international commerce.
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