By the way:顺便说一下;偶然地
例句:
Vera's been divorced for three years now.She told me,by the way,that she never plans to remarry.
维拉现在已经离婚3年了,顺便说一下,她还告诉我不再打算再婚
By the way,do you have any idea where the past office is?
顺便问一下你知道邮局在哪里吗?
BTW,=by the way一般公司的邮件都用btw简写
By the way.
by the way