VOA慢速英语:Great Smoky Mountains: America's Most Popular National Park

range - n. a series of mountains or hills in a line

mist - n. water in the form of very small drops floating in the air or falling as rain

frontier - n. a distant area where few people live

conserve - v. to keep (something) safe or from being damaged or destroyed

benefit - n. good or helpful result or effect

roam - v. to go to different places freely without having a particular purpose or plan

habitat - n. the place or type of place where a plant or animal naturally or normally lives or grows