业务知识熟练
Proficient in business knowledge
以上为机器翻译结果，长、整句建议使用 人工翻译 。
笔者认为应注意三个方面，即精通外贸英语、通晓外贸业务知识和熟练应用“7c”写作原则。
I believe that the following three aspects are very important: to master foreign trade English, to familiarity with foreign trade practice and to grasp the "7c" writing principles.
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