bumpiness

例句：

1. 1.The car was bumpy on the uneven road.
   汽车在不平的路上颠簸。
2. 2. She felt a bit bumpy after the long flight.
   长途飞行后她感到有点颠簸。
3. 3. The old house had a lot of bumpiness in its walls.
   这所老房子的墙壁有很多颠簸感。