Description of the procedures for the security thread.

线程安全实例。该程序说明线程安全问题。

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There is a big security thread in its authentication mechanism. Or in other words, there is no such a thing in it.

该软件的验证机制存在非常大安全隐患，或者说，它根本没有验证机制。

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It has the security thread, the dollar amount on the right bottom corner will change color under the light and the picture in the water mark is the same as the main portrait.

它有一条防伪线，右下角的金额会随著光线而改变颜色、浮水印的图案和主要的画像相同等等。

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He said stores should check the quality of the paper and printing, as well as the metallic security thread and watermark.

BBC: Counterfeit notes warning for East Lothian shopkeepers

From the outset of his administration, Mr. Obama has been trying to thread the needle between national security policy and his ideological affinity with civil liberties lawyers and human-rights activists, meeting with and consulting them prior to making detainee-related decisions.

WSJ: Burlingame: Shoe Bomber Richard Reid Sues to Resume Jihad from Prison

Senior citizens on Social Security who are just hanging on by a thread.

WHITEHOUSE: President Obama Speaks on Deficit Negotiations