distance type

例句：

1. 1.The distance between the two cities is about 500 kilometers.
   两座城市之间的距离大约是500公里。
2. 2.The train travels at a constant speed, so the distance covered in one hour is the same as that in another hour.
   火车以恒定速度行驶，所以一个小时内覆盖的距离和另一个小时内覆盖的距离是相同的。
3. 3. The company's headquarters are located at a considerable distance from the city center.
   公司的总部位于市中心相当远的地方。