公里 [gōng lǐ]kilometerRelative explainations:kilometre milimetre milimeter mile kil mm. millimeter millimetre klick klik Examples:那条河长300公里。The river is 300 kilometers in length.为了安全起见，在市内开车时速不要超过三十公里。For safety's sake, don't drive more than 30 kilometers per hour in the city.飞机以每小时900公里的速度飞行。The airplane flies at 900 kilometers an hour.
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