名词
中文翻译：虚弱
同义词：
['frail', 'feeble', 'feeble-minded', 'feeble-spirited']
例句：
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1.The old man was weakener when he fell from his chair.
老人从椅子上摔下来时很虚弱。
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2. She felt weakener after her long flight.
长途飞行后她感到非常虚弱。
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3. The child was weakener and couldn't walk properly.
那个孩子虚弱得走不了路。