Although the environmental impact assessment system has been for nearly forty years, theories and techniques are till in the stage of developing and improving.
建立环境影响评价制度已有近四十年的历史，环境影响评价的理论和技术方法等日臻完善。
Environmental impact assessment system is China environmental protection law of a very important basic system, in our country already executed for nearly 20 years, has played a very positive role.
环境影响评价制度是中国环境保护法中的一项非常重要的基本制度，在我国已实行近二十年，发挥了很好的作用。
It is China's current environmental impact assessment an important component of the system.
它是我国现行环境影响评价制度的重要组成部分。
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