spiral nebula
短语n. 螺旋星云, 旋涡星云
词形变化
spiral nebulae
spiral nebulas
复数
spiral nebulas
spiral nebulae
复数
释义与例句
n.
-
1.
a spiral-shaped nebula
天文 -
2.
a spiral-shaped white nebula; these were generally determined to be spiral galaxies in the 20th century
废旧 天文