secondary pollutant短语¹⁴⁴⁹⁷²⁺² 基本例句 次级污染物,二级污染物,次生污染物 In addition, ozone is a secondary pollutant of automobile use. 另外，臭氧为机动车辆使用过程中所产生的另一主要污染物。 chinafanyi Municipal sludge is an inevitable secondary pollutant in the municipal wastewater treatment. How to treat the sludge more efficiently and protect our environment is a faced vital problem currently. 城市污泥是城市污水处理不可避免的产物，如何使污泥的处置与环境保护之间达到一个良好的平衡是当前面临的重大课题。 chemyq