Astronomy. Any of a number of linear markings on the planet Mars formerly reported by some telescopic observers. Now historical.
| 单词 | θ524 |
| 释义 | the world > the universe > planet > primary planet > superior planet > [noun] > Mars > canal (1) canal1879 Astronomy. Any of a number of linear markings on the planet Mars formerly reported by some telescopic observers. Now historical. |
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