速度变动, 变速的英文

• variation of speed

• 速度:    velocity; speed; blast; bat
• 变动:    change; alteration; oscillat ...
• 变速:    change speed; shifting; vari ...
• 速度变动:    perturbation of velocity; speed fluctuation; speed flutuation; speed variation; variation of speed; velocity fluctuation
• 速度变速箱:    pick off gearbox; pick-off gearbox; quick gearbox