The present situation of ecological environment in China and analysis of contributing factor are discussed. Some practical suggestions are put forward.
论述了中国生态环境的现状，同时对形成现状的原因作了系统的分析，对保护中国生态环境提出了可行性建议。
The 7 common factors which come from factor analysis almost consisted with theoretic structure, and the contributing rate of cumulative sums of squares was 66.03%.
因为分析产生的7个公因子与理论结构基本一致，累积方差贡献率为66.03%。
On the basis of analysis of the cost construct and its contributing factor in the mechanical product life-cycle, the generation rules of product manufacturing cost are studied.
本文在分析产品全生命周期中各段成本构成及其影响因数的基础上，揭示了产品制造成本的形成规律。
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