线圈架
As the main field type of soil erosion in the three gorges reservoir area, the sloping fields shall easily runoff totally or form skeleton soil which shall result in declining productivity of land.
坡地作为三峡库区土壤侵蚀的主要地类,其土层极易完全流失或形成粗骨土,导致土地生产力下降。
Coral reefs form when coral dies and behind a skeleton that seems as hard as rock.
珊瑚礁是珊瑚死去时,留下如石头一样硬的骨骼所形成.
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