a relation between two opposite attributes or tendencies;"he viewed it as a balanced polarity between good and evil"
having an indicated pole (as the distinction between positive and negative electric charges);"he got the polarity of the battery reversed" "charges of opposite sign"
中英词源
polarity 两级化，截然对立www.WentiYi.cOM
来自pole,地级，两级，-ity,名词后缀。
polarity (n.)
1640s, originally of magnets, from polar + -ity.
词态变化
复数 polarities;
权威造句
1. the growing polarity between the left and right wings of the party
党内左右两派间日益明显的对立
来自《权威词典》
2. Polarity is inherent in a magnet.
极性是磁铁的固有性质.
来自《现代英汉综合大词典》
3. There are miscellaneous tools, pliers , putty knife, polarity stamps, battery stamping or coding equipment, lead cutters.
有各种工具 、 手钳 、 油灰刀, 极性印戮 、 电他标记打印或编号机 、 铅切刀.
来自辞典例句
4. 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.
来自辞典例句
5. It is not possible to try to salvage or change the polarity correctly by charging.
