subsong / ˈsʌbˌsɔŋ, -ˌsɒŋ /

⚽高中词汇副歌子歌亚松子母歌

subsong 的定义

n. 名词 noun
  1. an unstructured, often rambling vocalization of low volume heard in young birds and, at the start of the breeding season, in adult birds of certain species.