They pose a serious threat to security.

他们对安全构成严重威胁。

《牛津词典》

Jamming concerns are nothing new, and they're not unique to security systems.

干扰问题并不是什么新鲜事，也不是安全系统独有的问题。

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But during World War Two, national leaders recognized the importance of the territory to security in the Pacific.

VOA: special.2009.03.02

The final point that I want to make with respect to security selection actually is a little bit different with the degree of opportunity.

我想说的最后一点是,就证券选择而言,运气也会带来一些差别

耶鲁公开课 - 金融市场课程节选

Of course, if think about it, as a community, the investment community is going to lose from security selection decisions.

其实很好理解,想想看,投资者群体可能,由于证券选择决策失误而蒙受损失

耶鲁公开课 - 金融市场课程节选

The queues stretched to security checkpoints where those holding the 25, 000 tickets distributed for the ceremony.

CNN: Pope Francis canonizes controversial saint Serra

To allay that fear, a large part of the aglet protocol is devoted to security.

ECONOMIST: Computer viruses need not be all bad

Shenzhen Airlines and Juneyao Airlines landed safely after some delays due to security checks.

WSJ: Chinese Airlines Receive Flight Threats