形容词
中文翻译：虚弱的
同义词：
['feeble', 'frail', 'feeble-minded', 'feeble-spirited']
例句：
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1. The old man is weak and needs to rest more often.
老人虚弱，需要更频繁地休息。
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2. The child was so weak that he couldn't walk by himself.
孩子太虚弱了，自己走不了路。
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3. The team's performance was weak in the crucial match.
球队在关键比赛中表现不佳。