长程音波设备(声弹)，简称为LRAD，发出声波的声音足够大以至于可以刺痛人并造成不可弥补的损害，这种设备可以用于阻止海盗。
Long range acoustic devices, or LRADs, emit sound waves loud enough to cause pain and permanent damage that could be directed towards the pirates.
长程音波设备(声弹)，简称为LRAD，发出声波的声音足够大以至于可以刺痛人并造成不可弥补的损害，这种设备可以用于阻止海盗。
Long range acoustic devices, or LRADs, emit sound waves loud enough to cause pain and permanent damage that could be directed towards the pirates.
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