They are also called basic tools and have some common features.

它们也被称为基本工具，并且具有一些共同的特性。

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English and computer skills are two basic tools for the 21st century.

掌握英语和计算机技能是二十一世纪的基本要求。

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English and computer skills are two basic tools for the 21st century.

掌握英语和计算机技能是二十一世纪的基本要求。

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