According to the Technical Guideline for Environmental Impact Assessment,the environmental protection industrial standard of the People's Republic of China,the emphases of environment impact assessment are suggested as follows: ecological environment assessment,the control of soil erosion,and risk and hazardous assessment.
根据国家环境影响评价导则确定天然气勘探开发工程项目的主要评价内容为 :生态环境影响评价 ,水土保持 ,风险危害评价。
The easily neglected problem of dangerous wind velocity has been discussed by mathematic deduction.
运用数学推导,探讨容易被人忽略的"危险风速"问题,得出了风速、危险风速和地面污染物浓度的关系曲线图。
