一探究竟

to check out / to investigate

one / single / a (article) / as soon as / entire; whole; all; throughout / "one" radical in Chinese characters (Kangxi radical 1) / also pr. [yao1] for greater clarity when spelling out numbers digit by digit

to explore / to search out / to scout / to visit / to stretch forward

to investigate / to delve / to probe / to enquire into / to look into

after all / to investigate / to study carefully / Taiwan pr. [jiu4]

to go to the bottom of a matter / after all / when all is said and done / (in an interrogative sentence) finally / outcome / result

unexpectedly / actually / to go so far as to / indeed