a smooth marble floor的用法和样例：
- As I neared the gate，a plump，middle-aged woman sprinted up from behind，lost her footing on the smooth marble floor and slid onto her back.
- Japanese bought a smooth marble closestool, german bought closestool of pilot of a computer, american bought a closestool that brings music.
- He made a smooth cut on the marble.
- The old man has a smooth temper.