kilometres
A kilometre is a metric unit of distance or length. One kilometre is a thousand metres and is equal to 0.62 miles.
only one kilometre from the border.
距离边境只有1公里。
The fire destroyed some 40,000 square kilometres of forest.
大火烧毁了近4万平方公里的森林。
vehicles travelling at up to 300 kilometres per hour.
时速可达300公里的车辆。