an undulating curve
wavelike motion; a gentle rising and falling in the manner of waves
(physics) a movement up and down or back and forth
- As an assistant one to the shipping industry,which is fluctuated with the undulation of the shipping.
- Factor effecting injection quantity uniformity were briefly analyzed, and the undulation quantity and injecting pulse revising was put forth to meet the respective demand.
- When a gust of wind blows across the sea-like desert, the undulation of the sand has the shape of the wind imprinted on it.
- But some unexpected enthusiasm and undulation are needed under the rational business imprints.
The delicious undulation of the lapping water.出自： R. Church