electronic tagging

noun

1. 电子标识跟踪系统（附于人体，以便警方等知道其行踪）
   the system of attaching an electronic device to a person so that the police, etc. know where the person is

1. 电子追踪（指通过在罪犯或嫌疑犯身上安装电子装置以确定其行踪的方法）
   Electronic tagging is a system in which a criminal or suspected criminal has an electronic device attached to them which enables the police to know if they leave a particular area.