同義詞
1. movement back and forth in a regular rhythm
- swinging
- , swing
- , swaying
- , swinging from side to side
- , swinging backwards and forwards
- , swinging back and forth
- , swinging to and fro
- , vibration
- , wavering
- , fluctuation
- , see-sawing
- , vacillation
- , yo-yoing
- , variation