查询词典 submersed

Leaves estipulate, 2-4-whorled, decussate, or alternate, in terrestrial species always simple, in aquatic submersed species always pectinately lobed.

叶无托叶，2-4轮生，交互对生，或者互生，在陆生种内总是单叶，在水生沉水种内总是梳状裂。

The results of the 60 days experiment showed that both submersed macrophytes(Hydrilla verticillata,Potamogeton malaianus and Vallisneria natans) and floating-leaved macrophytes(Nymphoides indica and Trapa quadrispinosa)had very high removal rates for TN,TP,NO_3~——N and PO_4~——P,and the values exceeded 60%,but Potamogeton malaianus and Vallisneria natans were most effective at removing nutr...

结果表明，沉水植物马来眼子菜、苦草、轮叶黑藻和浮叶植物荇菜、菱等5种水生植物对水体的总氮、总磷、硝态氮和正磷酸盐都有较好的去除效果，去除率在60%以上，且以马来眼子菜和苦草的效果最好，去除率在80%以上。

A submersed Old World Plant having whorled, lance-shaped leaves and unisexual, solitary, axillary flowers.

软水草一种生在水中的东半球植物，叶片呈螺纹形、矛状，雌雄异株，花为单生、腋生

Further analyses found that pulmonates prefer the macrophytes which can spread their terminal parts on the water surface, while prosobranchs prefer the macrophytes which are entirely submersed.

分析还发现肺螺类偏好能接近水面的植物，而前鳃螺类偏好完全沉于水底的植物。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。