名词
中文翻译：虚弱
同义词：
['fragility', 'fragility', 'vulnerability']
例句：
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1.She was frail and easily tired.
她身体虚弱，很容易疲劳。
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2. The old man's frail health made him vulnerable to the cold.
老人虚弱的身体使他容易受冷。
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3. The baby's fragile bones were prone to injury.
婴儿的脆弱骨骼容易受伤。