如果从北京挖一个洞贯穿地心，你会到达哪个国家？Have you ever thought about this? If you dig a hole in Earth and it’s deep enough, you may finally reach another country. Now a map can tell you where you will end up if you dig straight through Earth.
21世纪报社版权所有，未经书面授权，禁止转载或建立镜像。 主办单位：中国日报社 Copyright by 21st Century English Education Media All Rights Reserved 版权所有 复制必究 京ICP备13028878号-12京公网安备 11010502033664号
京公网安备 11010502033664号
