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确保高等级公路的稳定和高速行车安全,同时达到与周围环境的协调,保持生态环境的相对平衡,美化高等级公路的效果。
To ensure the stability of high-grade high-speed roads and high-speed traffic safety, while achieving coordination with the surrounding environment, to maintain the relative balance of the ecological environment, the effect of beautifying high-grade highways.