这将解开水星密度为何如此之高，水星的两极是否存在冰以及水星的大气从何而来等疑问。

It will clear up questions about its curiously high density, whether it has ice at its poles and where its atmosphere comes from.

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由于蒙气差随着大气密度、温度和压力等条件的变化而变化，为降低蒙气差对光电测量设备测量精度的影响，提出了精密恒星回扫的新方法。

A new method of precise star back scanning for reducing the influence of atmosphere refraction on the measurement accuracy of optoelectronic instrument is presented.

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密度：植被被整体规划保护，通过风、大气等环境条件的把控为使用者创造舒适的公园环境。

Density: Vegetation is used for protecting the entire plot from winds, atmospheric agents, and also for controlling the comfort conditions of the users during their visit at the park.

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