frailty
[ˈfrelti]
n.
脆弱;
虚弱;
（性格或行为上的）弱点;
缺点;
例句:
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Is't frailty that thus errs?
来自Othello,Shakespeare
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She died after a long period of increasing frailty.
在很长一段时间里，她身体日渐虚弱，最后离开人世。
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Increasing frailty meant that she was more and more confined to bed.
日益衰弱意味着她愈来愈需要卧床。
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Despite increasing physical frailty, he continued to write stories.
尽管身体越来越虛弱, 他仍然继续写小说.
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It's as if they locate the tune's frailty.
来自BBC
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She was trembling, and her frailty in the cold enraged me.
来自NEWYORKER