Alone, Laurie felt unprotected. 劳里独自一人，感到缺乏保护。

The long Russian frontier was highly vulnerable to a German attack. 漫长的俄国边境很容易遭到德国人的攻击。

Journalists going to war zones do so at great risk to themselves. 前往战争地区的记者们这样做冒着很大的风险。

an exposed left flank 易受攻击的左翼

An ancient religious custom is under threat. 古老的宗教习俗受到了威胁。

Workers are entirely at the mercy of dishonest employers. 工人们完全听任不诚实的雇主的摆布。

an undefended border 不设防的边界

With the downturn in the market their jobs have become very insecure. 由于市场低迷，他们的工作已变得毫无保障。

In 90% of burglaries, access is through insecure doors and windows. 在90%的入室盗窃案件中，作案者都是通过不牢固的门窗进入室内的。

He knew he was playing with fire by encouraging her attentions.

U.S. troops are doing a terrific job, but they are in harm's way.