| 单词 | planetary nebula |
| 释义 | planetary nebula 【天文学】行星状星云 以上来源于：《21世纪大英汉词典》 planetary nebulan.【天文】行星状星云详细释义源自:《新世纪英汉大词典》Collins外研社 n.行星状星云【天文学】英英释义n.a nebula that was once thought to be a star with its planets but is now thought to be a very hot star surrounded by an expanding en |
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