identifier
/aɪ ˈdentɪfaɪə(r)/noun
1- a person or thing that identifies something鉴定人, 识别人; 鉴定物, 识别物：
the new NHS number is to be known as the 'unique patient identifier'.
新的英国国民医疗号码将通称为“独有的患者识别凭据”。
1.1
- a person who identifies with something or someone认同者, 支持者：
Labour identifiers and left-wingers.
工党支持者和左翼人士。
1.2
- Computing a sequence of characters used to identify or refer to a program or an element, such as a variable or a set of data, within it【计算机】标识符。