求翻译：然后分别研究公路规划设计阶段、公路建设施工阶段的节能减排技术和方法，以及新工艺、新材料、新能源的开发和应用，为高速公路节能减排提供了技术保障。是什么意思？

Then study the highway planning and design phase, construction phase of highway construction energy saving technology and methods, as well as new technology, new materials, new energy development and application of highway energy saving provides technical support.

And then individually research highway planning and design phase, construction phase of the highway construction and energy emissions reduction technology and methods, as well as new techniques and new materials, new energy development and application, can be reduced to highway section provide a tec

Then studies the road plan design stage, the highway construction construction stage energy conservation separately reduces a row of technology and the method, as well as the new craft, the new material, the new energy development and the application, reduced the platoon for the highway energy conse

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正在翻译，请等待...