形容词
中文翻译：虚弱的
同义词：
['frail', 'feeble', 'feeble-minded', 'flabby', 'frailty']
例句：
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1. The old man was weak from lack of exercise.
老人由于缺乏锻炼而身体虚弱。
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2. The baby is too weak to walk yet.
婴儿还太弱，不能走路。
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3. The old woman's health is weak due to poor diet.
由于饮食不佳，这位老妇人的健康变得虚弱。