形容词
中文翻译：软弱的
同义词：
['frail', 'feeble', 'flabby', 'feeble-minded']
例句：
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1. The old man is weakand needs help to get around.
老人身体虚弱，需要帮助才能走动。
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2. The babyis so weak that he can'tsit up by himself.
婴儿太虚弱了，他自己都坐不起来。
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3. Theteam was weak in defense, allowing the opponent to scoreeasily.
球队在防守上表现薄弱，让对方轻松得分。