a flag on a pole 旗杆上的旗
Since ancient times, thinkers including the Greek astronomer Ptolemy believed in the existence of a huge continent on the South Pole.
VOA: special.2009.06.03
They're going to move from a negative pole to a positive pole, so they're going to move through this gel.
它们会从负极移向正极,会通过这块凝胶板
Because this is a dipole, he chose the pole part of dipole to give us polar covalency.
这就是偶极,鲍林选择了偶极中“极“这一部分来,组成极性共价这个词向我们诠释。
应用推荐