Since the 1980s, levitation has been used on trains in Europe, Japan and China. These maglev trains, seem to float above the ground. ____________________"Imagine there's an earthquake and the early warning turns on the warning systems and the supports fall away as the building starts to hover. The shaking stops, the supports return, and no one in that room or in that building ever knew there was an earthquake." 自上世纪80年代以来,磁悬浮已被应用于欧洲、日本和中国的列车上.这些磁悬浮列车似乎漂浮在地面之上._____________________他说,"想象一下地震来了,早期预警打开警报系统,楼房的支座收回去,大楼开始悬浮.地震停止后,支座重新升起,大楼里的人们甚至不知道发生了地震."
