This method will create great quantities of dirty mire in the process, easily causing secondary pollution.

这类方法在处理过程中产生大量污泥，容易产生二次污染。

youdao

This method will create great quantities of dirty mire in the process, easily causing secondary pollution.

这类方法在处理过程中产生大量污泥，容易产生二次污染。

youdao