polar moment的用法和樣例：
例句
- An explanation of the magnitude of such a dipole moment must seal explicity with two contributing factors.
對這和偶極矩大小的解釋必須明確研究兩個有關的因素。 - If a non-polar molecule is subjected to an electric field, the electrons and nuclei are displaced and a diplo moment is generated.
如果一個無極分子被置於電場作用之下，則電子和核發生位移，從而產生一偶極矩。
