Reasonable tourism development of historical cultural cities may bring them substantial space and social, economic benefit and satisfy the cost on their protection.
对历史文化名城进行合理的旅游开发可以给历史文化名城带来的巨大的空间、社会和经济效益，并满足其自身的保护成本。
Hypersonic vehicle has a broad applied prospects, it could help to achieve economic and efficient development of space.
高超声速飞行器有着广阔的应用背景，可以帮助人们实现经济、高效的太空开发和利用。
The research on residential space change would help to understand urban social and economic activities, and provide guidance for urban planning and development.
研究城市居住空间的变迁对于理解城市社会、经济的运行和变化，指导城市规划和建设具有重要意义。
The research on residential space change would help to understand urban social and economic activities, and provide guidance for urban planning and development.
研究城市居住空间的变迁对于理解城市社会、经济的运行和变化，指导城市规划和建设具有重要意义。
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