心中無數

to have no idea / to be unsure

heart / mind / intention / center / core / CL:顆|颗[ke1],個|个[ge4]

central point / in one's thoughts / in one's heart

China / Chinese / surname Zhong

within / among / in / middle / center / while (doing sth) / during / (dialect) OK / all right

to hit (the mark) / to be hit by / to suffer / to win (a prize, a lottery)

not to have / no / none / not / to lack / un- / -less

countless / numberless / innumerable

to count / to count as / to regard as / to enumerate (sb's shortcomings)

number / figure / several / CL:個|个[ge4]

frequently / repeatedly