层峦叠嶂 layer upon layer of peaks and knolls; layer upon layer of mountains; multiple ranges of hills; peaks rising one higher than the other; range upon range of hills
" the plant will adopt the technology of sequencing batch reactor , dual media filter and disinfection process to reduce organic pollutants , suspended solids , nutrients and pathogenic organisms from sewage to a very low level , " he added 他补充:昂坪污水处理厂会采用顺序分批式反应器技术、双滤层滤池及消毒程序,以减少污水中的有机污染物、悬浮固体、营养物及病原微生物至极低水平。