Near Surface Reference Temperature?
近表面参考温度NSRT ？
The geoid is also used as a reference surface from which to map the topographical features on the planet.
本次制作的地球水准面模型在绘制地球地貌时也将会被用来参考。
This height is calculated relative to an average elevation determined for the moon's surface, since there is no such thing as a "sea level" as a reference on the moon.
这个高度是对比月球表面平均高度后计算出来的，因为月球表面并没有“海平面”作为参照。
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