airport tax

复数：airport taxes

1. Before boarding the flight, passengers are required to pay the airport tax at the check-in counter.
   在登机之前，乘客需要在登机柜台支付机场税。
2. Many travelers are unaware that the ticket price does not include the airport tax, which can be quite substantial.
   许多旅客并不知道机票价格不包括机场税，这笔费用可能相当可观。