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BNC: 0 COCA: 41110
roentgennoun [ C ]also röntgen uk/ˈrɒnt.ɡən/ us/ˈrent.ɡən/ specialized

a unit of measurement for showing the amount of radiation received by a person over a period of time伦琴(辐射的照射量单位)

BNC: 0 COCA: 41110
BNC: 0 COCA: 41110
BNC: 0 COCA: 41110

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