To protect his new invention,he took out

练习题库2022-08-02 6

问题 To protect his new invention,he took out a patent（）it.on

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答案

解析 take out a patent on sth.取得一项……的专利。另外hold a patent on对……拥有专项权利。句意：为了保护他的发明，他申请了专利。

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英语一研究生

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