幸运的是,您根本不需要手工构造地图文件。
对地球的内部构造了解甚少,甚至根本就不了解。
The internal structure of the Earth's poorly understood, or even simply do not understand.
对地球的内部构造了解甚少,甚至根本就不了解。
The internal structure of the Earth's poorly understood, or even simply do not understand.
应用推荐