上下摇动

例句：

1. 1. The tree sways gently in the breeze.
   这棵树在微风中轻轻摇摆。
2. 2. The crowd sways to the rhythm of the music.
   人群随着音乐的节奏摇摆。
3. 3. The boat sways back and forth on the waves.
   小船在波浪上来回摇摆。