大家在查： lovebird unremittingly 懒散怠惰弗朗西斯•福山没有变动程源路易丝本索埃文·巴克斯特贝壳似罗•威尔逊

by duckweed

by duckweed

by duckweed

by duckweed

1

Caption : A common frog struggles to the surface for a gulp of air in a mill pond swamped by duckweed .

描述：在浮萍覆盖的磨坊池塘，一只普通青蛙挣扎着露出水面喘口气。

2

Suitable Phosphorus Concentration Level for Restoration by Duckweed

浮萍适合修复水体磷浓度范围的研究

3

Removal of Nitrogen and Phosphorus by Duckweed - Cultured System

浮萍放养体系对污水氮磷的净化效果

4

Jiaxing, China : A boy floats on a river covered by duckweed Reuters

中国嘉兴：一男孩漂浮在浮萍覆盖的河面上（路透社）。

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