1. A thousand kilometres separates the two cities. 两座城市相隔一千公里。
2. The Atlantic Ocean separates America from Europe. 大西洋把美洲和欧洲分隔开来。
3. When an iceberg separates from the ice shelf and capsizes, the green ice is exposed. 当冰山从冰架上分离并倾覆时，绿色的冰层就露出来了。
4. The boundary of an area of land is a line in people's imagination that separates it from other areas. 一块土地的边界是人们想象中的一条与其他地区分开的线。
5. Is five seconds on the floor the critical threshold that separates a piece of eatable food from a case of food poisoning? 在地上停留五秒钟是将可食用食物与食物中毒区分开来的临界阈值吗？
