The paper introduced the superiority of constructed wetlands and the action principle of aquatic macrophytes, summarized the purification research of emergent plant, floating aquatic plant and submerged plant in home and abroad, discussed the applicability of different aquatic macrophytes in constructed wetlands, indicated the insufficiency of existing research.
文章介绍了人工湿地的优越性与水生植物的作用原理,综述了挺水植物、浮水植物和沉水植物在国内外的净化效果研究实践,讨论了各类型水生植物在人工湿地建设中的适用性,指出目前的研究不足之处。
bright-colored; a float attached by rope to the seabed to mark channels in a harbor or underwater hazards.
鲜艳的；用绳子连接到海底的飘浮物，港口的河床或者水下危险。
a float that trails from a ship by a knotted line in order to measure the ship's speed through the water.
用有节的绳子通过水测量船的航行速度的随船运动的飘浮物。
One, such as a person or an object, that floats or is capable of floating.
漂浮者，浮体飘浮着的或能飘浮着的东西，如人或物体
family of small free-floating thalloid plants.
自由飘浮的叶状体植物科。
Or even a solid object floating in the clouds.
有人甚至认为它是飘浮在云层之中的固态物体。
European floating plant with roundish heart-shaped leaves and white flowers.
欧洲的一种水生飘浮草本植物，叶心形略圆，花白色。
An air-filled sac or structure that aids in the flotation of an aquatic organism.
气囊水生动植物器官中用来帮助飘浮用的充满气体的囊或结构
During this, the astral body drifts free, slightly out phase with the physical body.
在这期间，星体躯体自由飘浮，稍稍在物质身体之上。
a floating structure (as a flat-bottomed boat) that serves as a dock or to support a bridge.
作为码头或支撑桥的飘浮的建筑物（类似于平底的小船）。
The balloon floated up into the air.
那个气球飘浮升空。
After the explosion dust was suspended in the air.
爆炸後灰尘飘浮於空中。
And the wheat fields waving, and the dust clouds rolling,
田野随风飘浮，烟雾朦胧，
The smell of perfume hung in the air.
香水的气味飘浮在空中。
He flies in leisurely circles high in the sky.
悠然飘浮，他在高空来回。
A small boat is just floating on or above water.
一只小船正飘浮在水上。
A white cloud floated in the sky.
一片白云飘浮在天空。
Floating on or as if on waves.
随波逐流的飘浮在海浪上的或象飘浮在海浪上似的
plant of ponds and slow streams having submerged and floating leaves and white flowers; Europe and North America.
生长在池塘或缓慢溪流中的植物，具有飘浮的叶子和白色的花；生长于欧洲或北美。