开关与自由运行的输出比，动静比的英文

output ratio of q-switching to free running q

• 开关:    Q-switching
• 与:    take part in; part ...
• 自由:    freedom; liberty
• 运行:    move; be in motion ...
• 的:    4次方是 The fourth po ...
• 输出:    export
• 比:    2
• 动静:    the sound of sth. ...