n.

1. 同等；类似；相同
2. （两个敌对国家的）势均力敌
3. 【商】平价
4. 【物】宇称性
5. 【数】奇偶性

n.

1. equality or equivalence, especially as regards status, pay, or value.
2. Mathematics  the fact of being an even or an odd number.
3. Physics  the property of a spatial wave equation that either remains the same or changes sign under a given transformation.

n.