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バックグラウンド放射線 | |||
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バックグラウンド放射線 (bakku-guraundo-hōshasen); 自然放射線; 背景放射 | |||
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Nuclear or ionizing radiations arising from within the body itself or from the environment to which individuals are constantly exposed. (FRA) |
background : 1 phrase in 1 subject |
Microsoft | 1 |