名词
中文翻译：虚弱
同义词：
['weakness', 'frailty']
例句：
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1.The old man has many infirmities that make him unable to walk.
这位老人有很多虚弱，使他无法行走。
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2. Thepatient's infirmities were causedby a long illness.
病人的虚弱是由长期的疾病引起的。
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3. The elderly often have moreinfirmities than younger people.
老年人往往比年轻人有更多的虚弱。