polarity例句
Polarity is inherent in a magnet.
极性是磁铁的固有性质.
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.
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.