He tells me is a city boy, and this is his first time to live in a camp like this.
他说他是一个都市男孩,这是他第一次过这种野营生活。
This immense chasm has been formed by an underground stream which has tunneled a course through a flaw in the rocks.
这个深邃的洞穴是由一条地下暗泉冲刷岩石中的缝隙并使之慢慢变大而形成的。