| 单词 | radiant region |
| 释义 | > as lemmasradiant region ΚΠ 1841 Trans. Amer. Philos. Soc. 7 267 A radiant region, if not a radiant point, was soon perceivable. The paths traced back..passed through a circle..with a radius of 2°. 1899 Science 6 Jan. 37/1 The discovery of this comet..on the radiant region of the Leonids, is the most interesting episode of the meteor observations. < as lemmas |
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