1. What's the area of Canada in square kilometer? 加拿大的面积有多少平方公里？
2. She watched the train drag her car almost a kilometer down the railway tracks. 她看着火车把她的车沿着铁轨拖了将近一公里。
3. The game included three events: full marathon, half marathon and 5 kilometer mini marathon. 比赛包括全程马拉松、半程马拉松和5公里迷你马拉松三个项目。
4. Further up the coast in Ofunato, the port's tugboat still sits in someone's backyard about a kilometer from the water. 再往上溯到大船渡，港口的拖船仍停泊在离水约一公里的某户人家的后院。
5. 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. 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。
