尽管钢笔很小，但它改变了历史，促进了国家间的贸易，记录事件，传播新闻，比其他所有工具为人类做的工作都多。

Though it is small, the pen has changed the history, improved the trade of countries, recorded events, carried news, and done far more work for human beings than all other tools.

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手工具添加包含从油管刀具到螺母驱动器的所有工具。

The hand tool additions encompass everything from tubing cutters to nut drivers.

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你已拥有所有工具中最强大的一个：你自己。

You have the most powerful tool of all: Yourself.

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And this is a tool with which you can navigate all the things that we know about going on campus.

这是你能够掌控,校园中发生的所有事情的一个工具。

哈佛公开课 - 计算机科学课程节选

Some children bring all the tools they are on and one of the boys share he wants to bring a ice cream machine.

一些孩子画上了他们喜欢的所有工具,其中一个男孩,告诉大家他想带一台冰激凌机。

麻省理工公开课 - 媒体、教育、市场课程节选

Simply by clicking that link you can then log into your account; and then on the left hand side what appears is a little menu of all of your friends who are also using this tool and you can select any one of them and actually see what that person is shopping.

只需轻点鼠标便可进入自己的账户;,页面的左边有一个菜单栏,其中是你所有也在使用这个工具的朋友,你可以选中其中一个,查看ta所选择的课程。

哈佛公开课 - 计算机科学课程节选