| 单词 | astro- | 
| 释义 | astro- or   astr- pref. 1.  a.  Star: astrophysics. b.  Celestial body: astrometry. c.  Outer space: astronaut. 2.  The aster of a cell: astrosphere. [Greek, from astron, star; see  ster-3 in the Appendix of Indo-European roots.]  | 
	
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