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unary operator
comp., MS	一元運算子 (An operator that takes only one operand, for example, the increment (++) operator)
IT	一元运算符; 单目运算符; 一元〔—目〕运算符
tech.	—元运算符; 一目运算符; 单项算符
telecom.	一元算子

unary operator: 3 phrases in 2 subjects

Information technology	2
Space	1