因为事件越大，传感器在它衰减到低于触发器电平之前的振荡次数越多。
Because the larger the event, the larger the number of oscillations of the transducer before they decay below the trigger level.
因为事件越大，传感器在它衰减到低于触发器电平之前的振荡次数越多。
Because the larger the event, the larger the number of oscillations of the transducer before they decay below the trigger level.
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