activity of sludge的用法和样例：
- The respirometric activities of sludge before and after tame have been determined by the BOD Track, and the activity could be expressed by first slope of respirometric curve.
- The result showed that an excellent correlation was obtained between treatment effect and respirometric activities of sludge.
- Research on Activity of Sludge in A Jet Aeration Reactor
- Usually neglect of sludge regulation.
- Auditing is the primary activity of the CPA.