1. Oils have a high carbon and hydrogen content and are nonpolar substances. 油的碳、氢元素含量很高，为非极性物质。
2. The eluent is changed in a regular manner starting with a nonpolar solvent and gradually replacing it by a more polar one. 洗脱液以常规的顺序更换，首先用非极性溶剂，然后逐步被极性较强的所替换。
3. Diodes fabricated on semipolar substrates also have much less intense internal electric fields than polar diodes do, though not as low as in nonpolar diodes. 在半极性基板上制作的二极体，其内部电场也比极性二极体小得多，不过还是比非极性二极体高。
