他不但精通 相关主题，他的写作能力也不输给任何人。
Not only does he focus on pertinent topics, but his writing ability is second to none.
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.
精通中英文，具备优秀的写作能力和翻译技巧。
Proficiency in Chinese AND English languages, with good writing skill and translation skill.
精通中英文，具备优秀的写作能力和翻译技巧。
Proficiency in Chinese AND English languages, with good writing skill and translation skill.
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