...净作用同时进行，其水质变化情形在各河流不尽相 5 同，且一般可归纳为四典型之分段，最上游为开始分解段（zone of degradation）， 再次之为积极分解段（zone of active decomposition），然后为復原段（zone of recovery），最后又回復到与未受污染水质一样之...
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However, under the same climate scenario, no significant degradation was found in the scale of 30 years in the continuous permafrost zone, despite distinct ground temperature rising there.
相同气候背景下，多年冻土腹部地温有升高，但在30年尺度上不会发生明显的退化。
In this paper, root of blue algae in Taihu lake was introduced. For example, formation of blue algae in ecological theory was analyzed and degradation mechanism of lakeshore zone was generalized.
介绍了太湖发生蓝藻的根源，从生态学原理上分析了太湖蓝藻的成因，概括了湖滨带的退化机理及现状。
Due to its strong consumption of soil water, soil desiccation and grassland degradation happened quite frequently at this zone.
苜蓿具有强烈的耗水性能，导致半湿润区苜蓿草地发生干燥化，草地退化较为严重。
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