1·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.
臭氧作为杀菌剂广泛应用于各个领域，它以无残留、无污染、安全、高效等特点越来越引起人们的关注。