碧空

晨的朦胧、午间的碧空和夜晚的萤火虫。“On top of old Smoky, all covered with snow.” That is the first line of an American folk song associated with the Great Smoky Mountains. The breathtaking mountain range runs along the border of Tennessee and Nort

晨的朦胧、午间的碧空和夜晚的萤火虫。“On top of old Smoky， all covered with snow.” That is the first line of an American folk song associated with the Great Smoky Mountains. The breathtaking mountain range runs along the border of Tennessee and Nort