May observes that, gained a powerful tool to control their own bodies, they are still fighting to use that tool as they see fit.

VOA: standard.2010.05.12

To work in Frost is to use a tool.

读他的诗歌就是在使用一种工具。

耶鲁公开课 - 现代诗歌课程节选

I think with all the media we have available today is definitely good to kind of use that as a tool if you can.

我觉得，如果你会用的话，我们现今可用的媒体绝对是个不错的工具。

英语学习技巧 - SpeakingMax英语口语达人

it's too easy but it's also too delicious to take this little biographical fact of Milton's college nickname and use it in some way as a tool for reading A Mask.

这简单却有趣,把弥尔顿大学时的昵称记事,利用并作为一种工具去阅读《面具》

耶鲁公开课 - 弥尔顿课程节选

The standard library, that first line of code, it's not strictly necessary but any time you use a function, a tool that someone else wrote that lives in that so called library, you do need that include line as we'll see.

标准库函数--第一行代码，严格来说，不是每次都要写的，但是一旦你调用某个别人写，的函数，而这个函数又恰巧位于标准库里面,你就要像我们看到的这样，把它include进去。

哈佛公开课 - 计算机科学课程节选