形容词
中文翻译：Unknown
同义词：
['thin', 'frail', 'feeble', 'weak', 'unhealthy', 'malnourished']
例句：
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1. The callow figure of the old man made him look even more feeble.
老人瘦弱的身影让他看起来更加虚弱。
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2. The callow trees were struggling to survive in the harsh winter.
这些瘦弱的树木在严酷的冬天挣扎着生存。
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3. She was crippled by a bad fall and had to stay in bed for weeks.
她因一次跌倒而行动不便，不得不卧床数周。