The plant manager explained that we aerate the wastewater before releasing it into the river.

廠長說明，我們會先將廢水曝氣，再排放到河裡。

Our quote includes new pumps that aerate the treatment tanks around the clock.

我們的報價包含新的幫浦，可全天候為處理槽曝氣。

The shipment of blowers used to aerate sewage arrived two days behind schedule.

用來為污水曝氣的鼓風機貨物晚了兩天才送達。