形容词
中文翻译：外部的
同义词：
['external', 'externally', 'extraneous']
例句：
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1. The company's decision was made by an extern board of directors.
公司的决策是由一个外部董事会做出的。
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2. The book is written in a language that is extern to most people.
这本书是用大多数人不懂的语言写的。
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3. The new policy will have an extern impact on the local economy.
新政策将对当地经济产生外溢效应。