an area of land that has remained largely undisturbed by humans and their modern development
荒野, 原始森林
a structure built over a river, road, etc. that enables people or vehicles to go from one side to the other
桥
a very tall and large natural structure that looks like a huge hill with a pointed top that is often covered in snow
山, 高山
a natural and continuous stream of water flowing on the land to the sea, a lake, or another river
河流, 小溪
a long, flexible cord made by twisting together strands of fibers, wire, or other material, used for tying, pulling, or supporting things
绳子, 绳索
a low area of land between mountains or hills, often with a river flowing through it
山谷
used to talk or ask about the number of things or people that are involved or concerned
多少, 多少个
used to ask or talk about one or more members of a group of things or people, when we are not sure about it or about them
哪个, 哪一