For the smooth dam, because its slope is so smooth that no biofilm can be accreted, the fuction is only operated by the aeration process.是什么意思_For the smooth dam, because its slope is so smooth that no biofilm can be accreted, the fuction is only operated by the aeration process.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句