secondary environment meaning in English

次环境
次生环境

Secondary environment risk assessment in the process of coal mining
煤炭开采工程中次生环境风险的评价
On evaluation index system of secondary environment impacts by urban rail transit
城市轨道交通次生环境影响评价指标体系建构
In this paper , the authors studied environmental geochemistry of hohhot , divided soil secondary environments according to their qualities , probed into the soil environmental geochemical element migration , and put forward some opinions for tackling various environmental geochemical problems
摘要介绍了呼和浩特市环境地球化学特徵，对该区土壤次生环境进行了质量分区划分，探讨该区土壤环境地球化学元素迁移概略，提出了土壤环境地球化学治理的具体意见。