Water will often be pumped from the source to an elevated point to allow gravity-feed distribution. Planning of the site should take this into account.
通常采用的重力给水方式，需要用水泵从水源把水抽取到高处，在规划安置点时应当考虑到这一点。
The authors developed an air pollution dispersion system(APDS)with elevated Gauss dispersion model to simulate the impact of industrial point source pollution on region air quality.
开发了一个基于高斯扩散的大气 污染扩散空间信息系统，用于模拟 工业点源 污染对区域大气质量的影响。
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