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词汇
penumbra
释义
penumbra音标:[ pi'nʌmbrə ] 名词复数:penumbrae n.(pl. -brae , penumbras)1.【物理学】半影,黑影周围的半阴影。2.(绘画中)画面浓淡相交处。3.【天文学】太阳黑子周围的半暗部;(星面部的)阴影。adj.-bral
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