平稳地

例句：

1. 1.The surface of the car is very smooth.
   这辆车的表面非常光滑。
2. 2. The floor was smooth and polished to perfection.
   地板被打磨得完美无瑕。
3. 3.The paint on the walls has a smooth finish.
   墙上的油漆有光滑的质感。