沃尔沙姆有过赢得20公里赛跑的光荣时刻。
他克服了25公里时的痛苦极限，进而赢得了他的第一个马拉松冠军。
He broke through the pain barrier at 25 kilometres and went on to win his first marathon.
他一天能走50公里，脚力真好。
He's really got strong legs to be able to walk 50 kilometres a day.
长途行军几百公里，没有一个人掉队。
In a long march of several hundred kilometres, no one dropped out.
从这里到机场足有5公里。
朗山占地108平方公里，自然风光多彩，旅游资源丰富。
Covering an area of 108 square kilometers, Langshan Mountain has rich natural scenery and lots of tourism resources.
更重要的是，中国正在研制最高时速400公里的新型高速列车。
What's more, China is working on the new high speed trains with the highest speed of 400km/h.
每周六早上9点，5万多名跑步者出发，绕着当地的公园跑5公里。
Every Saturday morning, at 9 am, more than 50,000 runners set off to run 5 km around their local park.
我们可以以每小时480公里的速度飞行，避开红绿灯和繁忙的道路。
We could fly at 480 km per hour, avoiding traffic lights and busy roads.
这个保护组织想要把佛州香榧的幼苗移到500公里以北的地方，以扩大这个物种的范围。
This conservation group wants to translocate seedlings, Florida Torreya seedlings, 500 kilometers north in order to expand the species' range.
有史以来最为复杂的工程项目创造了一组巨大的相互连接的模块，其以每小时27000公里的速度绕地球运行。
The most complex engineering project ever attempted has created an enormous set of interlinked modules that orbits the planet at more than 27,000 kilometres per hour.
你真的能够拉出一条36000公里长的纳米管线，或者纳米管带，其强度比钢铁要高，但其厚度可能只是人类头发的千分之一。
You could actually draw out a 36,000-kilometer strand or ribbon of nanotubes stronger than steel, but maybe a thousandth the thickness of a human hair.
北极燕鸥在从南美洲的最南端飞往北极圈的路线全长2万公里，但燕鸥这一路上都不会留意观鸟船送来的散发臭味却又可口的鲱鱼。
An arctic tern, on its 20,000 km flight from the extreme south of South America to the Arctic circle, will take no notice of a nice smelly herring offered from a bird-watcher's boat along the way.
猎豹的奔跑速度每小时可达97公里。
他们跋山涉水，步行二百余公里，来到了一个青山环抱的小村庄。
Across hills and rivers， they walked more than two hundred kilometres and arrived at a little hamlet nestling in the green mountains.
你先跑5公里，再跑10公里，然后跑半程马拉松。
You start by running 5 km, move up to a 10 km, then a half marathon.
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