词路径
- entity
- physical entity
- process
- physical process
- natural process
- natural action
- action
- activity
- oscillation
上位词
- action
- activity
- natural action
- natural process
- periodic event
- recurrent event
- undulation
- wave
下位词
- Carnot's ideal cycle
- Carnot cycle
- beat
- cardiac cycle
- libration
- menstrual cycle
- pass
- resonance
- ripple
- sympathetic vibration
- transient