Listen to the sound that the bus makes before the door opens.
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AlpheccaStarsListen to the sound that the bus makes before the door opens.Video is very nice but would you also explain it in words?
Rover_KEThere is usually a faint hissing noise as the hydraulic mechanism lowers the front end of the bus to permit less able people to get on more easily.The writer compares this noise to the sound of a human sigh.Then it is figurative.