a sudden flurry of activity的用法和样例：
- There was a sudden spurt of activity in the housing market.
- He twisted up with a sudden stab of pain.
- There was a flurry of activity as the film star appeared on the balcony.
- A flurry of wind upset the small boat.
- A flurry of interest in the new product; a flurry of activity when the plane landed.