Your unsuspecting target will have a hard time 'timing' the location of the sound because the beeps will vary in intervals ranging from 2 to 8 minutes.
您不知情的目标将很难有一个'时间'声音的位置，因为不同的蜂鸣声将在2至8分钟不等间隔。
2
It was a queer sound, ranging from low moaning to high-pitched crying.