“of unknown etiology”簡單造句，of unknown etiology造句子

2、An outbreak of a disease of unknown etiology is currently ongoing in Cacuaco municipality, Angola.

1、Sarcoidosis is a chronic granulomatous disorder of unknown etiology.

3、Clinical and pathological characteristics of immunohistochemistry staining for HBV and HCV antigen on liver tissue of unknown etiology

5、October 2009 - as of 28 October 2009, the Ministry of Health has reported 3 367 suspected cases of viral diseases of unknown etiology in 4 islands: Brava, Fogo, Maio, and Santiago.

4、Objective: To study the relationship between the anti-reproductive antibodies and recurrent spontaneous abortion of unknown etiology.