busy；
lively
bustling
hopping
例句：
1.First, I stand at a busy corner, merely looking at people, trying by sight of them to understand something of their lives.
首先，我站在一个热闹的角落，仅仅是看着人们，试图以审视他们来理解他们生活的某些东西。
2.This lively town is handy for Londoners. 。
这个热闹的小城离伦敦很近。
3.The main attraction was the bustling market. 。
最富吸引力的是热闹的市场。
4.The clubs in town are really hopping. 。
城里的俱乐部真够热闹的。