Our manager tends to sermonize about punctuality during every Monday morning meeting.

我們經理每週一早上的會議都愛對準時這件事說教。

Please don't sermonize in the email; just explain the new expense policy clearly.

請不要在電子郵件裡說教,只要清楚說明新的報帳規定就好。

The tour guide sermonized about littering instead of describing the historic temple.

導遊沒有介紹那座古廟,反而一直對亂丟垃圾的事說教。