weak;feeble;collapse;traik;crack-up ;

Though his heart is said to be weak, he seems perfectly healthy.
虽说他的心脏衰弱, 但他看来还十分健康.
来源:《现代汉英综合大词典》To see my body literally wither away before my eyes was exasperating.
眼见自己的身体日渐衰弱真是让人心烦。
来源:《柯林斯高阶英汉双解学习词典》The technique consists of injecting healthy cells into the weakened muscles.
该技术是把健康细胞注射到衰弱的肌肉里面。
来源:《柯林斯高阶英汉双解学习词典》He appears to be strong and healthy , but , as a matter of fact, he suffers from a very weak heart.
他看上去强健, 其实他的心脏很衰弱.
来源:《现代汉英综合大词典》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。
来源:《牛津高阶英汉双解词典》
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