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。
2.
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。
