The plant species with high propagation capability and growth rate had the advantage in competition, which ensured their survival in the water-level fluctuation zone.

高繁殖力和高生长率的物种在竞争中具有优势，确保其能在消落带生存。

youdao

The tailrace surge chamber shared by two units , common in hydropower stations with diversion systems , has problems of water level fluctuation and hydraulic disturbance.

摘要双机共尾水调压室是水电站引水发电系统中一种常见的布置形式，存在尾水调压室水位波动和水力干扰问题。

youdao

The characteristics of fluid flow in the mould of two ports SEN and four ports SEN have been compared and the influences of SEN on the level fluctuation are investigated by water modeling experiment.

比较研究了薄板坯连铸用二孔型水口和四孔型水口流场特征，水模试验结果表明，采用两种水口的薄板坯结晶器流场均存在非稳定性现象。

youdao