roentgensˈrɒntjənzCOCA³¹⁵¹¹¹⁺⁴BNC²³⁶²¹³⁺¹ 基本例句 n.伦琴射线;X射线化伦琴原型roentgen的复数 The resistivity of some of the insulating materials mentioned above is temporarily impaired by exposure to a few thousand roentgens of X radiation. 上述的某些绝缘材料在受到几千伦琴的 X辐射照射后,其电阻率会出现暂时性的减少。 bab