customer class的用法和樣例：
例句
- The cost and benefit for participants of the interruptible load contract are analyzed, and the discrete customer types are used to express the compensation cost for the customer.
摘要分析了可中斷負荷參與者的相關(guān)成本和效益，采用離散的用戶(hù)類(lèi)型參數來(lái)反映用戶(hù)希望得到的停電補償。
