operating charge

• 运行费用

operating charge的用法和样例：

例句

1. Initial investment and operating costs usually favor the large single continuous digester.
   较低的初始投资和运行费用通常使得间歇式蒸煮更受欢迎。
2. The experimental results showed that dosing PAC was an effective way to increase membrane flux and decrease the operating cost of MBR.
   向膜生物反应器内投加粉末活性炭是提高和维持膜通量的有效途径，并且可以降低运行费用。