hepatitis of unknown etiology 原因不明性肝炎
Sarcoidosis is a chronic granulomatous disorder of unknown etiology.
结节病是一种原因未明的慢性肉芽肿性疾病。
Because of unknown etiology and treatment effect is not very ideal tradition.
由于病因不明，传统治疗效果并不甚理想。
An outbreak of a disease of unknown etiology is currently ongoing in Cacuaco municipality, Angola.
安哥拉卡瓜科市目前正在爆发一种病因不明的疾病。
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