Ottawa and Washington have to find a delicate balance between the free flow of commerce and legitimate security concerns.

渥太华和华盛顿必须在自由贸易流通和司法安全事务之间找到一个微妙的平衡。

《柯林斯英汉双解大词典》

One of the main theoretical home-security concerns is whether or not a given system is vulnerable to being blocked from working altogether.

理论上，主要的家庭安全问题之一，是特定系统是否易受到阻碍，完全无法运作。

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General security concerns.

一般的安全问题。

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She said the United States knows there are reasonable security concerns about the service.

VOA: special.2010.08.06

on our planet, and effects could be security concerns,

在我们的地球，这些后果可能会危及到安全，

全球变暖和发达国家 - SpeakingMax英语口语达人

President Obama, speaking Thursday on CNN, said he recognized Israel's security concerns.

VOA: special.2010.06.05

The United Nations has pulled its international observers out of southern Iraq because of security concerns.

BBC: UN observers leave southern Iraq

There are European security concerns, such as in Africa, that NATO would not want to touch.

ECONOMIST: France and NATO

Citing security concerns, airlines are declining to discuss screening procedures and the decisions surrounding them.

CNN: Airlines, passengers confront racial profiling