形容词
中文翻译：虚弱的
同义词：
['feeble', 'frail', 'feeble-minded', 'weak-willed']
例句：
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1. The old man was so weak that he couldn't walk without help.
老人虚弱到无法自己行走。
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2. The team's performance was weak, and they lost the game.
球队的表现很弱，输掉了比赛。
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3. The baby is too weak to feed on its own.
婴儿太弱小，无法自行喂养。