名词
中文翻译：疾病
同义词：
['illness', 'ailment', 'condition']
例句：
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1. He was diagnosed with a serious illness last week.
他上周被诊断出患有严重的疾病。
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2. The patient's condition has not improved despite the treatment.
尽管治疗了，病人的状况仍未见好转。
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3. Doctors are trying to determine the cause of his illness.
医生们正试图确定他生病的原因。