Deep well injection may create pollutional problems far more severe than the ones being corrected.
深井注入也会产生污染问题，远比已经解决的更为严重。
2
This paper reports the results of water pollutional detection of Kuihe River in Xuzhou city using micronucleus test technique of vicia faba root tip cells.
使用蚕豆根尖细胞微核技术监测奎河徐州市区段水质污染状况。
3
Ozone as a disinfectant is used extensively in various regions. It is intensely concerned because of its properties of no - residual, no - pollutional, safe and effectual.