1) stepped operation time
阶段运行历时
1.
Taking the urban wastewater as investigation objective,the influence of stepped operation time,hydraulic retention time (HRT),density of dissolved oxygen(DO),and sludge retention time (SRT) on the efficiency of biological nitrogen removal with integrated activated sludge processing was investigated and,then,several improving measures of the design and operation with this technique were discussed.
以城市污水为研究对象,研究了阶段运行历时、水力停留时间、溶解氧浓度及泥龄对一体化活性污泥法生物脱氮效果的影响,并对该工艺若干设计、运行的改良措施进行了讨论。
2) stage running
阶段运行
3) operating period
运行阶段
1.
The high energy consumption problem of large public building in the operating period is significant more and more.
近年来随着大型公共建筑运行阶段高耗能的问题得到越来越多的重视,如何提高既有大型公共建筑的运行水平,大力推广节能改造已成为建设部门面临的重要工作。
4) six-stage operation
六阶段运行
6) pre-reproductive period
幼体阶段历时
1.
<Abstrcat>Durations of early developmental stages, including embryonic development (De) and pre-reproductive period (Dp) of three strains of Brachionus angularis collected from Qingdao (QD strain), Guangzhou (GZ strain) and Wuhu (WH strain) cities respectively, were studied at 25℃, and with five concentrations (0.
4×106cells/mL的斜生栅藻为食物,研究了采自广州、芜湖和青岛的角突臂尾轮虫胚胎发育时间和幼体阶段历时。
补充资料：历时
（事情）经过时日：这一战役，～六十五天。
说明：补充资料仅用于学习参考，请勿用于其它任何用途。
参考词条