centrometer

例句：

1. 1. The ruler is 30 centimeters long.
   尺子长30厘米。
2. 2. 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。
3. 3.The height of the building is 100 meters above sea level.
   这座大楼的高度比海平面高出100米。