Usually with lower-case initial. A unit of exposure to X or gamma radiation, now defined as equal to the quantity of radiation that gives rise to…
| 单词 | θ79538 | 
| 释义 | the world > matter > physics > atomic nucleus > measurement of ionizing radiation > 			[noun]		 > unit of exposure (1)		 Roentgen1922 Usually with lower-case initial. A unit of exposure to X or gamma radiation, now defined as equal to the quantity of radiation that gives rise to…  | 
	
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