kilometern.=kilometre 公里；千米(略作km)kilometer-ton千米吨kilometer stone里程标kilometer per hour千米每小时, 千米S_SEM小时Kilometers per Hour千米/小时kilometer per second每秒公里kilometer old street千米古街Kilometers Per Second千米/秒Kilometers In the Hour公里/小时kilometers of road operated营业线路公里kilometers of track operated运营轨道公里