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单词 roentgen
释义
roent·gen also rönt·gen (rĕntgən, -jən, rŭnt-)
n. Abbr. R or r
A unit of radiation exposure equal to the quantity of ionizing radiation that will produce one electrostatic unit of electricity in one cubic centimeter of dry air at 0°C and standard atmospheric pressure.

[After Wilhelm Conrad Roentgen.]

roentgen adj.
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