a fallen city的用法和样例：
- The malformation of his knee is caused by a fall.
- A fall of rocks blocked the road.
- The car was pinned under a fallen tree.
- We are expecting a fall in stock prices.
- The malformation of his knee was caused by a fall.
- Tom had a fall and his under lip began to swell up.
a fallen city的相关资料：
Aohaka a a radioactive transuranic metallic element A humiliating condition or circumstance. A pharmaceutical product or preparation. a devastating explosion/fire/cyclone a birth/ marriage/ death certificate a scolding nagging bad-tempered woman. a disease characterized by inflammation. A knife--edge compensated ink-stylus A semicircular structure or arrangement. a concrete/underground/secret bunker