transaction fee的用法和樣例：
例句
- Every time a customer uses a card, retailers must pay an "interchange" fee.
只要顧客使用信用卡，零售商都必須為此支付交易費。 - If a cardholder uses the credit card at least once a month, Mizuho waives the transaction fees at some ATMs.
如果一位信用卡持卡人每月至少刷卡消費一次，瑞穗金融集團就會免除他使用部分自動提款機時的交易費。
