汉英词典
MEANING OF 河外星系
EXAMPLE SENTENCES | ||
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人们发现河外星系有多少个? How many does people discover the external galaxy having? | ||
我们用肉眼是看不到河外星系的。 Extragalactic nebula is invisible to the naked eye. | ||
整个宇宙拥有十亿多个河外星系,一个河外星系就是一座星城,每座星城有“居民”上千亿颗。 Our Universe contains over a billion galaxies; star cities each with a hundred billion inhabitants. |