a long and narrow valley的用法和样例：
- Lanzhou is a long and narrow east-west extension of the valley, the folder in the north and south between two mountains, north of the Yellow River in the foothills wear Kyushu and the City.
- He kicked in after a long and painful illness.
- We had a long and interesting talk.
- They from north south present Gu line to distributing in bank of madder of peace and tranquility, comprise a long and narrow half moon form roughly.