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单词 半球状
例句 DEFINITIVE EXAMPLES 权威例句〔planetarium〕An optical device for projecting images of celestial bodies and other astronomical phenomena onto the inner surface of a hemispherical dome.天象仪:一种能将天体和其它天文学现象的影象投射到半球状圆屋顶内表面的光学设备美国传统〔rose〕A form of gem cut marked by a flat base and a faceted, hemispheric upper surface.玫瑰款:一种底部平展且上表面呈半球状的多面体宝石款式美国传统
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