1896, in Roentgen rays "X-rays," in recognition of German physicist Wilhem Conrad R?ntgen (1845-1923), who discovered X-rays in 1895. As a unit of exposure to radiation, it is attested from 1922, proposed in French in 1921.
雙語例句
1. Roentgen Diagnosis of Neonatal Gastro - esophageal Reflux ( Report Of 44 Cases )
新生兒胃食管返流影像學(xué)分析 ( 附44例報告 )
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2. Roentgen discovered X - rays; Darwin found many new species on the Galapagos Islands.
倫琴發(fā)現(xiàn)了x射線; 這里發(fā)現(xiàn)了很多古物.
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3. William Roentgen discovered X - rays.
威廉?倫琴發(fā)現(xiàn)了 X 射線.
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4. Employing Distortion Compensated Roentgen Analysis, rotational and translational motion at adjacent levels was quantified prospectively.