计费事件的提示 prompt for billable events

事件计费 Immediate Event Charging ; EBCF

留的事件计费 ECUR ; Event Charging with Unit Reservation

事件计费功能 event charging function

保留的事件计费 Event Charging with Unit Reservation ; ECUR

即时事件计费 Immediate Event Charging

单位保留的事件计费 ECUR ; Event Charging with Unit Reservation

有单位保留的事件计费 Event Charging with Unit Reservation