singsong
noun uk/ˈsɪŋ.sɒŋ/ us/ˈsɪŋ.sɑːŋ/
(MUSICAL VOICE)
[ S ]声音起伏的说话腔调
a voice rising and falling in level
She spoke in a singsong. 她说话抑扬顿挫。
(SINGING)
[ C ] UK (US singalong)（非正式的）齐唱，合唱
the informal singing of songs by a group of people
It's nice to have a good old-fashioned singsong now and again. 时不时搞一场精彩的老式合唱是件不错的事情。