a luminous and extremely tenuous region at the outer limit of the exosphere, consisting chiefly of ionized hydrogen and extending to approx…
单词 | θ8822 |
释义 | the world > the earth > weather and the atmosphere > [noun] > layer of gas surrounding earth (1) geocorona1959 a luminous and extremely tenuous region at the outer limit of the exosphere, consisting chiefly of ionized hydrogen and extending to approx… |
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