机场节点是指一个地区内的交通枢纽，集合了多种交通工具，如飞机、火车、地铁等，能够实现换乘和集散的功能。
它没有任何传输和交换数据的功能，只是为其它节点提供路径连接。
因此，机场节点作为一个交通枢纽，需要具备很强的接驳和承运能力；而独立节点则是网络中的一个单独的点，主要用于连接其它节点，起到桥梁的作用，使数据能够流通起来。
Excuse me, where is the check-in counter?
Can you tell me what time my flight departs/arrives?
Is there a gate change for my flight?
Can you help me find my boarding gate?
Can I have a window/aisle seat, please?
Excuse me, is there any priority boarding available for families with young children?
Where can I find a duty-free shop?
Could you please direct me to the nearest restroom?
Can you help me locate my baggage claim area?
Is there free Wi-Fi available in the airport?