equal to the mean distance between the Earth and the Sun (approximately 93 million miles or 150 million kilometers)
n the ratio of the distance traveled (in kilometers) to the time spent traveling (in hours)
approximately 0.5 kilometers
5.88 trillion miles or 9.46 trillion kilometers
In the metric system, one million meters, or one thousand kilometers.
kilometers per hour
un. 每小时公里[网络] 千米每时；千米每小时；公里每小时
