Yesterday, after a 3-year, 21-kilometer journey at top speeds of less than 0.2 kilometer per hour, the Opportunity rover finally arrived at Mars's Endeavour crater.
历经三年长途跋涉，穿越 21公里的险途，以最高不到 0.2 公里每小时的速度，机遇号火星车终于成功抵达火星表面的奋进陨石坑。
Since France introduced the first 260-kilometer-per-hour high speed train service between Paris and Lyons in 1981, the trains have achieved higher and higher speeds.
自从法国于1981年在巴黎至里昂推出首列时速260公里的高铁以来，列车的速度已经变得越来越快。
Travelling at a speed of over 400 kilometers per hour, the train can complete the 30-kilometer journey in eight minutes.
列车以每小时400公里的速度行驶，八分钟就能完成这段30公里的旅程。
Travelling at a speed of over 400 kilometers per hour, the train can complete the 30-kilometer journey in eight minutes.
列车以每小时400公里的速度行驶，八分钟就能完成这段30公里的旅程。
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