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词汇	planetary nebula
释义	planetary nebulan.（名词）planetary nebulathe Cat's Eye nebulaNGC 6543 A nebula, such as the Ring Nebula, consisting of a hot, blue-white, central star surrounded by an envelope of expanding gas.行星状星云：由一颗炽热的、蓝白色的中心恒星和包围它的一层向外膨胀的气体组成的星云，如环状星云
随便看	gaster gasters gastight gasting Gaston College Gastonia gastr- gastrectomies gastrectomy gastri- gastric gastric juice gastric reflux gastric ulcer gastrin gastrins gastritides gastritis gastro- gastro- gastrocnemii gastrocnemius gastroduodenal gastroenteric gastroenteritis

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