| 单词 | spiral arm |
| 释义 | spiral armnoun Astronomy.any of the elongated and curved spiral sections that are connected to the center of a spiral galaxy. Origin of spiral armFirst recorded in 1910–15 Words nearby spiral armspir-, spiracle, spiradenoma, spiraea, spiral, spiral arm, spiral bandage, spiral bevel gear, spiral binding, spiral-bound, spiral canal of cochlea Dictionary.com UnabridgedBased on the Random House Unabridged Dictionary, © Random House, Inc. 2020 |
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