This is the 779th most frequent Chinese word.
公里
Kilometer.
In this sentence, '公里' is used as a unit of measure for length or distance, indicating five kilometers.
这条自行车道的总长度是五公里。
The total length of this bike path is five kilometers.
'公里' is utilized to express the spatial separation between two locations, providing a quantitative measure of distance.
这个城市到最近的机场约四十公里远。
This city is about forty kilometers away from the nearest airport.
Here, '公里' again represents a unit of distance, emphasizing the length covered or to be covered.