Uasb
abbr. upflow anaerobic sludge blanket 升流式厌氧污泥床
🗣️ 情景例句
If you need anything, just ask.
假如你需要什么尽管讲。
She was so stunned, that she couldn't speak.
她惊愕得说不出话来。
He was just able to lie down on the ground, but could not stand up.
他只能躺在地上，但不能站起来。