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.
老人虚弱，需要休息。
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2. She felt weak after the long flight.
长途飞行后她感到虚弱。
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3. The baby was so weak that he couldn't walk for a week.
婴儿非常虚弱，以至于一周内都无法行走。