| 释义 |
roent·genBrE /ˈrɜːntjən/ , /ˈrɒntjən/ , /ˈrɜːntɡən/ , /ˈrɒntɡən/ NAmE /ˈrentjən/ , /ˈrəntjən/ , /ˈrentdʒən/ , /ˈrəntdʒən/ noun (physics物理) (abbreviation R ) a unit of radiation, used to measure the quantity of X-rays or gamma rays that have reached sb /sth 伦琴（辐射单位） |