Uasb
abbr. upflow anaerobic sludge blanket 升流式厌氧污泥床
🗣️ 情景例句
I'm so glad everyone is asleep.
很高兴大家都睡了。
Nothing is difficult to the man who will try.
世上无难事，只要人肯试。
The rope had been cut, so it was obvious that the lamb had been stolen.
绳子被人割断，很明显小羔羊是被人偷走了。