improving ecological environment quality 提高生态环境质量
Urban gardens have a function of improving ecological environment and transfiguring city image.
城市园林绿化具有改善城市生态环境和提高城市形象的功能。
This generates an important effect on lightening wind and sand harm, improving ecological environment and raising agricultural production level.
这对减轻该区的风沙危害，改善生态环境和提高农业生产水平，都起了重要的作用。
Forest is playing a vital role in maintaining natural ecological balance, improving ecological environment, preventing and remedying pollution etc.
森林在维持自然生态平衡、改善生态环境、防治污染等方面具有极其重要的功能。
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