名词
中文翻译：Unknown
同义词：
['major disease', 'primary disease', 'chiefdisease', 'principal ailment例句：1. The patient was diagnosedwith the principal disease.（病人被诊断出患有主要疾病。）2. The doctor recommended that shetake medication for her principal disease.（医生建议她服用药物来治疗她的主病。）']
例句：
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1. The patient was diagnosedwith the principal disease.
病人被诊断出患有主要疾病。
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2. The doctor recommended that shetake medication for her principal disease.
医生建议她服用药物来治疗她的主病。
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3.The research focused on identifying the principal diseasescausing blindness in developing countries.
该研究专注于识别导致发展中国家失明的主要疾病。