An explanation of the magnitude of such a dipole moment must seal explicity with two contributing factors. 对这和偶极矩大小的解释必须明确研究两个有关的因素。
If a non-polar molecule is subjected to an electric field, the electrons and nuclei are displaced and a diplo moment is generated. 如果一个无极分子被置于电场作用之下，则电子和核发生位移，从而产生一偶极矩。
