indeterminably
(ad.)不能決定地
In·de·ter·mi·na·ble a. Not determinable; impossible to be determined; not to be definitely known, ascertained, defined, or limited. -- In*de*ter*mi*na*bly, adv.
indeterminably
adv : in an indeterminable manner; "their relationship was of an
indeterminably vague nature"