蝙蝠会发出我们听不到的非常高的超声波脉冲。
The bat emits these ultrasonic pulses, very high pitch sound waves that we cannot hear.
调节超声波，可改变光脉冲的强度和周期。
Modulating the ultrasonic wave, intensity and period of the light pulse will change.
调节超声波，可改变光脉冲的强度和周期。
Modulating the ultrasonic wave, intensity and period of the light pulse will change.
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