Others study the impact of human activity on Earth's environment and design methods to protect the planet.
另一些地球学家则研究人类活动对地球环境的影响，并制订出保护地球的措施。
Pilot study on the design and planning of the City East entrance landscape in Zhangzhou is to further clarify the concept, principles and methods of application.
通过对漳州市城市东入口的景观规划设计的试验性研究，来进一步说明这些理念、原则与方法的运用。
This paper theoretically ex - pounds the measure, analyses and design methods of the reliability of communication networks, and puts forward the study trend of such a systematic project.
本文从理论的角度阐述了通信网可靠性的测度、分析以及设计方法，并在此基础上提出了通信网可靠性——这一系统工程的研究方向。
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