Ecology Security;
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security of terrestrial ecology environment 土地生态环境安全初探
Part five is the ensured system of cultivated land ecology security.
第五部分,耕地生态安全保障制度。
·2,447,543篇论文数据，部分数据来源于NoteExpress
As one of populous artificial ecosystems in the ecology domain, the security of urban ecosystem is more fragile.
作为人口高度集聚的人工生态系统，城市生态系统的安全性更加具有脆弱性。
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According to Alexei Yablokov, a noted scientist who used to advise President Boris Yeltsin on ecology and now heads a pressure group, Russia's security services remember and resent the role that greens played in the collapse of the Soviet Union.
ECONOMIST: Russia
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