vulnerable 的意思是adj.脆弱的;(身体上或感情上)易受…伤害的
例句:1.In cases of food poisoning, young children are especially vulnerable.
遇到食物中毒,幼儿尤其容易受危害。
2.Those most vulnerable to heat stress are the elderly.
上了年纪的人最容易因受热而生病。
3.She looked very vulnerable standing there on her own.
她独自站在那里,看上去弱不禁风。