英语词汇“expanding arm”的英英意思、用法、释义、翻译、读音、例句、短语、词组-英语词典

单词	expanding arm
释义	expanding arm expanding arm [ik′spand·iŋ ′ärm] (astronomy) A spiral arm of the Galaxy consisting of neutral hydrogen that lies between 2.5 and 4 kiloparsecs beyond the galactic center and is moving out from it at about 85 miles (135 kilometers) per second.
随便看	david barnard steinman david bartsch landscape architecture david baum international foundation david beattie duncan david beckham david begg associates david beika david-bek david ben gurion david ben-gurion david bengurion david bergelson david berger national memorial david (bible) david/biblical character david binder research david bixler david blaine david bloom david blunkett david bodian david boiko david bomberg david boreanaz david borisovich riazanov

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