Bioaeration
生物通气, 生物充气, 生物曝气法, 活性曝气法
🗣️ 情景例句
Why can't you do both?
为什么不能两样一起做？
While we were having breakfast,John was talking on the telephone.
当我们正在吃早餐时，约翰正在打电话。
Precautions of this sort are necessary, for it is impossible to foretell the exact nature of the difficulties which will confront the pot-holer.
作出这样的准备是必要的，因为无法预见到洞穴探险者究竟会遇到什么性质的困难。