Lack of security of tenure was a reason for many families becoming homeless.

居住权缺乏安全保障是许多家庭无家可归的一个原因。

《柯林斯英汉双解大词典》

Those who ask for the first reason might be thinking along the lines of what would be easiest or most obvious to use, without having thought through the security implications.

出于第一个原因而提出这样问题的人可能认为最明显的就是最简单的，而不用考虑其安全影响。

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Although security concerns played a key role in Sprint's decision to knock Huawei and ZTE out of the running, they weren't the only reason, another person familiar with the matter said.

另外一个对此事比较了解的人士说，虽然安全问题在Sprint拒绝华为和中兴这件事情上起了主要作用，但这并不是唯一的原因。

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On ABC's This Week, Cheney defended his stance, adding now that he is out of office, he sees no reason to remain silent on matters of national security.

VOA: standard.2010.02.14

"The lives of our soldiers are being put on the line because of our own security and that is the only reason that a government in any country would put our soldiers lives in danger."

VOA: standard.2009.10.21

Some have suggested that part of the reason that the Transportation Security Administration instituted aggressive patdowns in airport security lines was because it hoped people would more willingly go through whole-body-imaging scanners.

FORBES: Bad News For TSA Scanner Makers, Good News For 'Naked Body Scanner' Opponents

For this reason, the biggest security issue of the year, China's provocative missile tests off Taiwan in March, which put Chinese naval vessels virtually in the wake of American aircraft carriers, may be shelved in Jakarta.

CNN: TEST OF WILLS

And the reason she could be independent was because of Social Security and Medicare.

WHITEHOUSE: The White House