1. 顺便说到：flutter by:翅膀飞过 | by the bye;顺便说到 | belief:信念

2. 顺便说(问)一下,附带/顺便地：by far 到目前为止 | by the bye 顺便说(问)一下,附带/顺便地 | can not but 不得不

3. 顺便说到, 顺便提起 附带地：by the book || 按常规 | by the bye || 顺便说到, 顺便提起 附带地 | by the day || 按日

adv

1. introducing a different topic
in point of fact

e.g. incidentally, I won't go to the party

Synonym: by the wayincidentallyapropos