到底怎麼回事

到底 daoˋ diˇ

(At the end, Destination, In the, In the end, Reach the) Destination, In the end, In the long run, Reach the end, At the end of it all

怎麼 zenˇ me˙

(How, How is it, What) How, What, How is it that

怎麼回事 zenˇ me˙ huiˊ shiˋ

(What happened) What happened

回事 huiˊ shiˋ

(Report) Report back