first flush短语¹³¹⁶²⁰⁺³ 基本例句 初期冲刷 The process of pollutant overflow from the JXB sewer system and the event mean concentrationsEMCs of overflows in Shanghai were studied, and the first flush effects were discussed. 为此,重点研究了上海中心城区某合流制排水区域 JXB系统雨天污染物溢流的出流过程和污染物的事件平均浓度,并探讨了溢流污染物的初期效应。 dictall