Human beings have used tools for a very long time.

人类使用工具已经很长时间了。

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This section reviews a few of the most commonly used tools.

本节讨论一些最常用的工具。

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There are also two highly specialized, less frequently used tools, as shown in Table 2

还有两个高度专门化的、不那么常用的工具，如表 2 所示

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The ancestral Pueblo people used stone tools to widen the small natural openings in the face of the canyon walls.

VOA: special.2010.07.05

The researchers also found tools used by the Clovis culture, a group of human beings who lived at that time.

VOA: special.2009.01.20

The ancient Aztec civilization in current day Mexico used obsidian for making hunting tools and jewelry.

VOA: special.2009.09.16

Vandals have used tools to damage a pagan temple on a university campus, it has emerged.

BBC: Vandals attack pagan temple on Lampeter university land

The intruders used tools that allowed them to search for key words across a range of documents on the Chamber's network, including searches for financial and budget information, according to the person familiar with the investigation.

WSJ: Chinese Hackers Hit U.S. Chamber

Often key components are tools that are no longer used as tools but Mr Higgs can find a way to put them to use again.

BBC: How to build a bigger, better corkscrew