形容词
中文翻译：虚弱的
同义词：
['frail', 'feeble', 'feeble-minded', 'flabby', 'feeble-spirited']
例句：
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1. The old man is weak and needs to rest more often.
老人体弱多病，需要经常休息。
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2. The baby is too weak to walk yet.
婴儿还太小，还不能走路。
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3. The team's performance was weak in the crucial game.
球队在关键比赛中表现不佳。