To see all this in action, you'll put together a trip-planning page in which the user can type in a source and destination airport.
为了进行演示，您将组建一个旅行计划页面，在该页面中，用户可以输入出发地机场和目的地机场。
2
ROADSIDE billboards, posters on buses and subway escalators, ads in airport terminals-a type of publicity known as out-of-home advertising-used to be the dull end of the industry. No more.