When CD4 + t cells in the blood reduced to critical level, they become increasingly vulnerable to disease infestation.

当CD 4 + T细胞在人的血液减少到临界水平，他们越来越容易受到疾病的侵扰。

youdao

Project director Lee Rainie says most people don't realize how vulnerable their emails are.

VOA: standard.2010.06.22

So, they would have been more vulnerable and you wouldn't have to have such a powerful bow.

所以,既然普通弓箭容易造成受伤,你就不会需要用到那么强力的弓

耶鲁公开课 - 古希腊历史简介课程节选

In the 2007 poll, Mason-Dixon found that slightly more than half the respondents didn't feel vulnerable to hurricanes and didn't have a disaster plan.

CNN: Few coast dwellers ready for a hurricane, poll shows

After reading about Thermos's presentation on Forbes.com, ZRTP's developer Phil Zimmerman countered in a statement that the protocol wasn't actually vulnerable to eavesdropping.

FORBES: VoIP Vandals

By printing out new cheat sheets as often as every game, teams aren't even vulnerable if an old copy falls into enemy hands.

WSJ: College World Series: College Baseball Showing Signs of a Revolution With Catcher Wristbands