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It is necessary that you (should) learn some basic skills of computers first.
你很有必要先学习一些基础的电脑知识。
youdao
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Basic knowledge of computers. Has experience with POS system.
有基本的电脑应用知识，有POS餐饮系统操作经验。
youdao
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Basic knowledge of computers. Has experience with POS system.
有基本的电脑应用知识，有POS餐饮系统操作经验。
youdao