| 单词 | light bucket | 
| 释义 | > as lemmaslight bucket   light bucket  n. Astronomy (colloquial) a reflecting telescope with a relatively large aperture, regarded as a device for collecting and focusing low-intensity radiation. ΚΠ 1952    Science 29 Feb. 225/2  				The telescopes should be reflectors (because of their perfect achromatism) and should be of the ‘light-bucket’ type. 1970    Nature 7 Feb. 492/2  				Infrared telescopes, more properly called flux collectors—light buckets in the language of astronomy—are cheap compared with similar equipment for the visible spectrum. 2016    Altoona 		(Pa.)	 Mirror 27 Nov.  d6/3  				You'll need a larger light bucket—4 inches or more in diameter—to see fainter star clusters, nebulae and galaxies. < as lemmas | 
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