Various security marks can also be embedded beneath the surface.

各种安全标志也可安装在表面以下。

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First, there is no formal security labels, or is the formal manufacturers posted their own security marks.

第一、有没有正规的防伪标签，或者是正规厂家贴的自己的防伪标志。

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The scratch-and-win specialist marks the keys with printed codes and covers them with a special scratch-off layer (thermochromatic or other security inks could be used).

刮奖专家以印好的编码作为标记，并在上面覆盖一层可以挂掉的特殊涂层（可以使用热变色油墨或其他安全油墨）。

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December 7 is known as "national students' day" in Iran, and it marks the anniversary of the 1953 slaying of three students by Shah Mohammed Reza Pahlevi's security forces, following a coup against populist Prime Minister Mohammed Mosadegh, earlier that year Eyewitnesses say hundreds of students have received threatening emails,this week, warning them not to participate in Monday's demonstrations.

VOA: standard.2009.12.07

However, the use of privatized forces on the modern battlefield far out paces their previous employment, and the capabilities that the private security industry now brings to the table marks a watershed in the conduct of military operations.

CENTERFORSECURITYPOLICY: The Impact of Private Security on US Foreign Policy

Some Internet-security experts believe that the Georgia conflict marks the first time a known cyberattack has coincided with a ground war, but others said that similar computer attacks have accompanied military operations in the Middle East and elsewhere.

CNN: U.S. at risk of cyberattacks, experts say

That playing field would certainly would have been friendlier to McCain, who has long received higher marks from voters on issues of national security.

CNN: Poll findings could be trouble for McCain