英语语法分析

There are lots of phenolic byproducts in the production of mononitrotoluene, which have high toxicity and are difficult to be treated.

其生产过程中产生大量酚类副产物， 毒性大，难治理。

Mononitrotoluene wastewater is difficult to be treated. The experiment indicates the result of using compound chlorine dioxide generator to this wastewater treatment is satisfactory.

对较难处理的硝基甲苯废水，通过试验表明，采用复合二氧化氯处理该废水效果较理想。