您要查找的是不是：
- 低DO low DO concentration
- 低DO,亚硝酸氮积累 DO
- 低DO紊动床内有机物对硝化过程的影响 Influence of Organic Matters on Nitrification at Low DO in Biological Turbulent Bed Reactor
- 低的 low-lying
- 低成本 low cost
- 高低 (adv) simply; just
- 较低的 lower
- 偏低 on the low side
- 低端 low end
- 较低 lower
- 超低 ultralow
- 低点 low
- 低效率 ineffectiveness
- 低值易耗品 low priced and easily worn articles
- 低等 inferior
- 效率低 inefficiency
- 低层 low level
- 低碳 low-carbon (LC)
- 放低 avale
- 低地 lowland
