side note
noun /ˈsaɪd nəʊt/
/ˈsaɪd nəʊt/
- a spoken or written comment that provides additional, but not essential, information to the subject that is being discussed
旁注：口头或书面评论，为正在讨论的主题提供其他但非必要的信息，但不包括 - An interesting side note is that covers of the song also became big hits online.
有趣的是，这首歌的封面也在网上大受欢迎。
- An interesting side note is that covers of the song also became big hits online.