Many years' over cut has destroyed the forestry colony and endangered human existence environment.
由于多年来的过量采伐，破坏了森林群落结构，危及人类生存环境。
Computer network is the second environment for human existence, that is, a virtual environment made up of information.
计算机网络是人类的“第二生存环境”，即由信息构成的虚拟环境。
Technological practice is the organized activities of human beings to change the nature, to rebuild or create a new material and cultural environment for human's existence.
技术实践是人类所从事的改造自然、重塑或创造适合于人类生存的物质文化环境的有组织的活动。
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