求翻译：而且冬季地表水会结冰，抑制了水体流动。当植物开始衰败时，必须用人工的方法将其从湿地中移出，否则枯萎的植物会残留湿地中，造成二次污染或使基质发生堵塞（5）。是什么意思？

And surface water will freeze in winter, inhibit water flow. When the plants begin to decline, we must use artificial means to be removed from the wetlands, or the plant will wilt in the remaining wetlands, causing secondary pollution or clogging the matrix (5).

But winter ice surface water will contain water flows. When they begin to decline when the plant, they must use artificial means will be removed from its wetlands, otherwise the plant will wither away residual wetlands, resulting in the pollution or the Matrix 2 plug ( 5) occurs.

Moreover the winter surface volunteer fire brigade iced up, suppresses the water body to be mobile.When the plant starts deteriorates, must use the artificial method it from the wetland to emigrate, otherwise withers the plant can remain in the wetland, causes two pollution or causes the matrix to o

And surface water will freeze in winter, dampening water flow. When when the plant begins to decline, you must use artificial means to remove it from the wetlands, wetland or withering plants be residues, causing secondary pollution or clogging the matrix (5).

And surface water will freeze in winter, dampening water flow. When when the plant begins to decline, you must use artificial means to remove it from the wetlands, wetland or withering plants be residues, causing secondary pollution or clogging the matrix (5).