可数名词：

1.身份；本身；本体

2.同一人；同一物

3.同一（性）；相同，一致；相同处，一致处

4.个性，特性

5.【心】同一性，一致

词形变化

复数identities

英语解释

an operator that leaves unchanged the element on which it operates

exact sameness

the distinct personality of an individual regarded as a persisting entity

the individual characteristics by which a thing or person is recognized or known