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自然背景輻射
释义
自然背景輻射
zì rán bèi jǐng fú shè
在人類自然環境中的輻射。包括宇宙射線、來自人類和動物體內及體外環境中天然放射性元素的輻射，通稱為「自然背景輻射」。
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sports arbitrition court
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sports area
Sports are beneficial to building our bodies
sports are compulsory
sports circles stress-strain circle
sports city
sports civilization
sports class
sports class teaching
sports-climbing
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更新时间：2026/11/8 15:20:48