eng:to understand thoroughly
yue:佢對呢行已經睇通睇透，有咩嘢都難唔到佢。 (keoi5 deoi3 ni1 hong4 ji5 ging1 tai2 tung1 tai2 tau3, jau5 me1 je5 dou1 naan4 m4 dou2 keoi5.)
eng:He has a thorough understanding of his profession, so anything that arises causes him no difficulty.
eng:to see through, to penetrate
yue:呢個人好叻， 我諗冇人睇得透佢諗緊乜。 (ni1 go3 jan4 hou2 lek1 , ngo5 nam2 mou5 jan4 tai2 dak1 tau3 keoi5 nam2 gan2 mat1)
eng:This person is very smart. I think no one can see through him (know what he is thinking or planning).