It is forbidden to reclaim cultivated land by destroying forests or grasslands, to reclaim land from lakes and to encroach on tidal-flat areas of rivers.
禁止毁坏森林、草原开垦耕地，禁止围湖造田和侵占江河滩地。
This mode goes from low to high with the heighten of filling up and enlargement of sandbank (or tidal flat). 3.
这种自然演替模式随着滩涂（或沙洲）淤积增高和面积的扩涨，即按高程从低到高的顺序进行。
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