Cyanobacteria and other microorganisms build stromatolites in shallowwater as they grow, gradually trapping and binding sediments into the small rock-like towers and mounds.
They wriggled around in the sediments of shallow seas, gulped prey into their minuscule, baglike bodies and expelled the water through cone-shaped spouts around their mouths.
它们在浅海的沉积物中扭来扭去，把猎物吞进袋状的微小躯体里，把水从嘴巴周围的圆锥形喷口排出去。
3
The main influential factors on the phosphorus behavior between the sediments and overlying water were also discussed based on the characteristics of municipal shallow lake.