additional rate

例句：

1. 1. The hotel charges anadditional rate of $20 per nightfor a suite.
   酒店为套房额外收取每晚20美元的费用。
2. 2. Theairline added an additional chargeto the ticket price.
   航空公司在票价中增加了额外的费用。
3. 3. The restauranthas an additional charge for children under12 years old.
   这家餐厅对12岁以下儿童收取额外费用。