waviness

例句：

1. 1.The waves were so strong that they could almost be heard over the sound of the wind.
   海浪如此强烈，以至于几乎可以听到风声。
2. 2. The boat was rocking back and forth in the choppy sea.
   船在波涛汹涌的海面上来回摇晃。
3. 3. The music was a constant oscillation between joy and sadness.
   音乐是快乐与悲伤之间的不断摆动。