形容词
中文翻译：虚弱的
同义词：
['feeble', 'frail', 'feeble-minded']
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 child was too weak to walk by himself.
孩子太虚弱，无法自己走路。
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3. The team's performance was weak in the crucial match.
该队在关键的比赛中表现不佳。