This is the 823rd most frequent Chinese word.
机场
Airport.
In this context, 机场 represents general airports, emphasizing their characteristics or features.
在大城市里，机场都修得很现代化。
In big cities, airports are constructed in a very modern way.
Here, 机场 is used as a location providing services for air travel.
从这到机场需要一个小时的车程。
It takes an hour drive from here to the airport.
Here, the word 机场 is used to indicate the physical location of the airport where the action takes place.