A closer inspection of the tool mark shows a series of parallel teeth marks, probably from the use of a plumber's wrench or tongue-and-groove pliers.

放大后的检验，可见一系列平行的齿纹，有可能来自管钳，会其他靠钳齿来抓牢工件并旋转的钳子。

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StumbleUpon is a useful tool that lets you mark websites you like, save information for later and find webpages that other users have marked as interesting.

StumbleUpon是一个有用的工具。你可以标记你喜欢的网站，保存信息，发现其他用户感兴趣的网页。

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One of Mark Poster's important presuppositions is language is not transparent tool of action, the other is that subject is constructed in the actions and structures of interchange.

马克·波斯特有两个重要的理论前提，一是语言并非行动的透明工具，二是主体是在交往行动中和交往结构中被构成的。

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The tool Mark Zuckerberg designed to help Harvard kids get to know each other may be keeping future applicants from getting into their dream schools.

FORBES: What College Admission Officers Don't Like Seeing On Facebook: Vulgarity, Drinking Photos & 'Illegal Activities'

Other non-premium updates include a new Stamps tool that'll let you mark a document with symbols to indicate approval, disapproval, a question mark, an exclamation point and (of course) a heart.

ENGADGET

The tool was announced last month by CEO Mark Zuckerberg.

CNN: Doug Gross,