by the by

短语

词形变化

more by the by 比较级 most by the by 最高级

别名

by the bye by-the-by

释义与例句

adj.
  1. 1.

    Incidental; unplanned.

phr.
  1. 1.

    Used to introduce a new topic; incidentally, by the way.

词源

The second "by" is a noun meaning "a secondary issue". Phrase used since the 17th century.

来源：wiktionary