identity/aɪˈdentɪtɪ/
n.-ties1. 完全相同;绝对相同to reach an identity of views取得完全一致的看法
2. 身份;本身;本体The police are still uncertain of the murderer's identity.警察尚未证实杀人犯的身份。
He had lost his identity card and was being questioned by the police.他遗失了身份证,正在被警察查问。
3. 〈数〉恒等式