The approach of Epidemical Field Research was applied.

采用现场流行病学调查方法。

youdao

Methods:We adopted Epidemical Field Investigation method to study it.

方法：采用流行病学现场调查方法。

youdao

Methods:We adopted Epidemical Field Investigation method to study it.

方法：采用流行病学现场调查方法。

youdao