地心距离

上行离子主要分布在近地空间，其通量密度相对于地心距离呈负梯度。

The ionospheric up flowing ion mainly distributes in the near geo space and its flux has a negative gradient versus geo center distance .

地球刚好在它的中部区域凸出来，因此，厄瓜多尔的海平面离地心的距离较尼泊尔更远。

The Earth bulges at its midsection , so Ecuador 's sea level sits farther from the planet 's center than Nepal 's.

由于卫星测高能在全球范围内全天候地多次重复、准确地提供海洋表面到地心之间距离变化的观测值，为海面变化研究提供了全新的技术手段。

As it can provide observation results repeatedly and accurately in all weathely in the global extent , it creates a new field for the research on sea surface changes .

你站在北极时离地心的距离比你站在赤道时离地心的距离近20千米，因此在北极时你受到的地心引力更大一些。

If you stand on the North Pole , you 're 20 kilometers closer to the center of the Earth than if you stand on the equator , and you feel a stronger pull from gravity .