I want the function, which is a little tool, a line of code I can include in my own programs and generally those tools live in sections two or three of the manual.

我想要一个函数，那是一个小工具，在我程序中可以包含的一行代码,通常这些工具在手册的第二节,或第三节。

哈佛公开课 - 计算机科学课程节选

The particular tool or tools used for an individual matter may depend on a number of factors including the type of case, deadlines, amount of electronically stored information (ESI), value of the case, budget and many other factors.

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The lathe is a tool for making tools--it makes manual crafting tasks easier, allowing for increased production and lower costs.

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And now Costco will carry hand tools, power tools and tool storage units at all its 430 stores.

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