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1·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.

那是一种奇异的声音，有的是低沉的哀鸣，有的是高声的尖叫。