随着世界一体化的推进，中外经贸往来日益密切，商业信函在商业贸易中的作用更加重要。

With the promoting of world integration, Chinese and foreign economic and trade relations have become closer, the role of business letter at business trade is becoming more important.

youdao

随着世界一体化的推进，中外经贸往来日益密切，商业信函在商业贸易中的作用更加重要。

With the promoting of world integration, Chinese and foreign economic and trade relations have become closer, the role of business letter at business trade is becoming more important.

youdao