prepaid fee的用法和樣例：
例句
- Prepaid billing and affordable handsets on their own are not enough to ensure a rapid adoption of mobile phones, however.
然而，預付費系統以及支付得起的手機本身並並不足以確保行動電話的快速普及。 - The insurance agent seeking to expand marketing opportunities is well advised to consider prepaid legal services.
建議正在尋找市場擴展的保險代理關注預付費法律服務。
