The screen door system can offer the subway platform with safety, economy, resource-saving and silence.
地铁车站安装屏蔽门系统具有安全、经济、节能、环保等诸多优点。
The model also considers economy of scale and water delivery costs by identifying water reuse opportunities among enterprises, thus saving both water resource and economic costs.
该模型考虑水传递系统的规模和成本，寻求企业间水再利用机会，同时节约水资源和降低经济成本。
Recycling economy is a mode of economy in which economy operates in the same manner the natural ecological system recycles all its substances. It is characterized by resource saving and recycling.
所谓循环经济，就是按照自然生态物质循环方式运行的经济模式，它要求用生态学规律来指导人类社会的经济活动。
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