形容词
中文翻译：弱的
同义词：
['frail', 'feeble', 'weakly', 'feebly']
例句：
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1. The old man is weak and needs to rest more often.
老人身体虚弱，需要经常休息。
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2. The baby is weak and needs to be fed frequently.
婴儿身体虚弱，需要经常喂食。
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3. The team is weak in defense, which is a major concern for the coach.
球队在防守上较弱，这是教练们最担心的问题。