billing system

• 计费系统

billing system的用法和样例：

例句

1. The billing system is the core competitive power of the telecommunication business.
   电信业务的计费系统是电信运营商的核心竞争力之一。
2. Research on the Energy Tele-meter and Billing System Based on Ethernet.
   基于以太网的电能计量计费系统的研究。