bond polarity

• 键的极性

bond polarity的用法和样例：

例句

1. The polarity of the ends of the open-circuit conductor may then be deduced.
   这样就可以断定开路导体两端的极性。
2. The polarity of electrified clouds has been a source of puzzlement and controversy for several hundred years.
   起电云的极性问题几百年来一直令人困惑和争论不休。