永久偶极 meaning in English

permanent dipole

Table 1. 4 compares the boiling points of several alkyl ether that have permanent dipoles with those of hydrocarbons, which have no permanent dipoles .
表14对若干有永久偶极的烷基醚和没有永久偶极的烷烃的沸点作了比较。
Table 1 . 4 compares the boiling points of several alkyl ether that have permanent dipoles with those of hydrocarbons , which have no permanent dipoles
表1 4对若干有永久偶极的烷基醚和没有永久偶极的烷烃的沸点作了比较。