求翻译：现在我们经过的这了就是大峡谷的地缝了，“地缝”现在已经是地学界接受的一个“喀斯特地貌”术语，它是指非常狭窄且有相当深度与长度的流水沟谷，形态上表现为地壳表面的一条深切“天然岩缝”。由于其形成、保存十分困难，“地缝”也就成了旅游的热门景点。一般的地缝是下面窄，上面宽，有的是上面窄，下面宽，而像云龙河地缝上下垂直基本一致断面呈“U”字形的地缝极为罕见，目前世界上只发现罗马尼亚有类似的地缝，所以它的稀缺性、独特性可见一斑。是什么意思？

Now after this it means the Grand Canyon to sew, "to sew" is now accepted by geologists a "karst" terminology, it refers to the very narrow and there is considerable water depth and the length of the valley, the performance of morphological the surface of a deep crustal "natural chimney." Since its

Now we go through the Grand Canyon is the way that the stitches to sew" and "we are now in the land of academia accepted a "karst landscapes" term, and it is a very narrow and there is considerable depth and length of the ditch flow patterns, Valley, it took the form of the earth's crust surface a d

Now we pass through this was Grand Canyon's crack, “the crack” now already was one which the circles of geoscience accepted “the karst landform” the terminology, it was refers extremely narrow also has the suitable depth and the length running water run-off ditch, in the shape displays for an earth'

Now we have this is made for the Grand Canyon, "sew" is now accepted in the academic world a "Karst" term that refers to a very narrow and there is considerable depth and length of water gully, form characterized by a deep on the surface of the Earth's crust "natural rock". Since its formation, save

After this we have now is the Grand Canyon of the seam, "slit" is academic now accepts a "Karst" term that refers to a very narrow valleys and there is considerable depth and length of running water, form behave as a deeply on the surface of the Earth's crust "natural rock". Since its formation, sav