But some problems were emerged such as extension system, extension method and service system.

但是在植保技术推广体系、推广方法、服务体系上暴露出一些问题。

youdao

But some problems were emerged such as extension system, extension method and service system.

但是在植保技术推广体系、推广方法、服务体系上暴露出一些问题。

youdao