分子的正负电荷中心在无电场时不重合的，有固定的电偶极矩， 如水（H2O ）、盐酸（HCl）、 一氧化碳（CO）、二氧化硫（SO2）、环氧树脂、陶瓷等。
有极分子 [yǒu jí fēn zǐ]
双语例句原声例句
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啤酒和洗发水都有极性分子，它们可以在气液分解面上积累，但是阻止气泡破掉的机制，对于肥皂沫和啤酒来说，有着根本上的区别。
Both beer and shampoo have polar molecules that accumulate at a liquid-gas interface, but the mechanisms that prevent bubble collapse in soap foams or pilsner heads are fundamentally different.
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同时，他深信可以与所有极端分子进行谈判，在短短“90天内”就能实现国家的和平。
He also believes he can negotiate with the extremists, bringing peace to the country "within 90 days".
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本文以苯乙烯和丙烯酸酯的低分子共聚物为B段，以含有极性基团的单体为A段合成了A—B嵌段型颜料分散剂。
An A-B blocked pigment-dispersing agent has been synthesised , in which the A block is a monomer with polar groups and the B fo'oek is the oligomer of styrene and acrylate with lower molecular weight.
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We only have the one bond so the actual HF molecule is polar, it has a net dipole.
但HF中只有一根键,所以分子也是极性的而甲烷中有一个网状偶极。
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