| 单词 |
optically effective atmosphere |
| 释义 |
optically effective atmosphere optically effective atmosphere[′äp·tə·klē i′fek·tiv ′at·mə‚sfir] (geophysics) That portion of the atmosphere lying below the altitude (30-36 miles or 50-60 kilometers) from which scattered light at twilight still reaches the observer with sufficient intensity to be discerned. Also known as effective atmosphere. |
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