电气石的异极对称结构导致了其独特的电学性质——永久性自发电极性，表现为电气石微粒周围自发电场的存在。
Tourmaline with polar asymmetry structure has its particular electric characteristics-spontaneous polar electricity, which show as electrostatic electric field existing around mineral particles.
采用氢火焰极性毛细管气相色谱法代替原来的填充柱法，测定空气和废气中的异丁醇。
Using the hydrogen flame polar capillary vessel gas phase chromatography to replace the original packing column method, isobutyl alcohol in waste gas was determined.
异戊酰- L -肉碱的酶催化合成需要选择疏水、极性的溶剂作为反应介质。
To improve significantly the biosynthesis of isovaleryl-L-carnitine catalyzed by lipase needs to select an efficient and suitable reaction medium that is not only polar but also hydrophobic.
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