英德
有道
百度
谷歌
图片
维基
百科
旋臂
spiral arm
spiral arms
slewing
spiral arms
slewing
- 旋臂上主要是年轻明亮的恒星，是它们将旋臂内的气体照亮。
Previously, some astronomers had suggested that the anomalous arms are jets of particles being ejected by a supermassive black hole in nucleus of NGC 4258. - 液压驱动：升降旋臂，工件自动夹紧及任意调节工件斜角度。
Hydraulic driving: lift spin arm, workpiece automatic clamp and arbitrary adjusting the workpiece bevel . - 假设一条旋臂绕其星系中心一周大约2.5亿年，就像银河一样。
Suppose a spiral arm rotated around the center of its galaxy in about 250 million years -- as in the Milky Way.
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