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中国的森林
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中国的森林
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中国植被地理
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forests in China
中国的森林
森林是以乔木种为建群种、乔木层盖度>20%的植物群落总称,还包括高度大于5米,主秆明显的竹类为建群种的竹林,以及分布在(石质化、海岛、海滨、山顶等)特殊生境的乔木矮林。林学定义森林为以乔木为主体的生物群落及其环境因素共同构成的生态系统,包括林地和疏林地。
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oil spill accident in offshore oil exploitation
Oil Spill Contingency Plan for Marine Ships in China
oil spill of submarine pipeline
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