"And,they have no alternatives before them. This makes them especially vulnerable to exploitation and violence as they search for food and shelter.

VOA: standard.2009.10.04

A moral maturity as it comes to economic systems, as it comes to how we treat our most vulnerable, how we do foreign policy, what are some of the pathways as you see in front of us as we do moral maturity as we grow up?

经济体质的道德成熟，对待弱者的道德成熟，怎样制定外交政策，在我们逐渐成长的过程中,你认为我们有什么途径能够达到道德成熟吗？

普林斯顿公开课 - 人性课程节选

These conditions permitted a development of institutions and habits needed for freedom, even as they also made Europe vulnerable to conquests and to extinction, and Europe was almost extinguished practically before there was a Europe; very early in its history.

这些恰恰是自由的形成和发展,需要的的制度和特征,尽管这也使欧洲,在外敌入侵时变的不堪一击,实际上,在它早期的历史中,欧洲在尚未形成前就差点消失

耶鲁公开课 - 古希腊历史简介课程节选

He says among the hardest-to-reach vulnerable groups are those engaging in behaviors that in some countries are illegal or socially unacceptable, such as homosexuals.

VOA: standard.2009.11.15

It's also interesting that given the same level of nutritional problems -too much fat, too little fiber, too many calories, whatever it happens to be -not everybody is affected the same way, and some population groups are especially vulnerable, so we'll talk more about that later as well.

另一点值得关注的是,相同的不良营养水平下,太多脂肪,太少纤维,太高热量,无论是哪一种情况,人们受影响的程度不尽相同,有一些人群特别容易受到伤害,我们待会也会讲到这点

耶鲁公开课 - 关于食物的心理学、生物学和政治学课程节选

They also estimate as many as 244,000 American youth are vulnerable to exploitation.

VOA: standard.2009.11.13

In Southeast Asia, where millions of people are vulnerable to the effects of climate change, such as drought or unusually heavy rains, there are growing concerns for the future.

VOA: standard.2009.12.21

"And,high food prices and fuel prices, as well as drought have had a severe impact on the most vulnerable groups in Afghanistan, many of whom are also living in very poor and inadequate housing.

VOA: standard.2009.09.13