It's the wistful " ah, " the rolling trill, the soothing " ess."

有着惆怅的 " ah" ，起伏的颤缓的 " ess" 。

The 's' on the end is pronounced 'uz' because it followed an 'ess' sound.

末尾的“s” “uz” ，因它跟在“ess” 之后。