中英互译:But what these people fail to see is that international tourism may bring about a disastrous imp.act on our environment and local history.
中英互译:No one can deny the basic fact that it is impossible for average workers to master those hightechnology skills easily.
中英互译:Those urban planners who are blind to this point will pay a heavy price, which they cannot afford it.
石灰岩地区,地表Karst地貌有哪些类型,地下Karst地貌又有哪些类型?