ascertain

v.探知

as to, as usual, as well, as well as, as yet, as...as, as...as possible, as...as..., ASA, asap, asbestos, asbestosis, ascend, ascendancy, ascendancy (also ascendency), ascendant, ascendant (also ascendent), ascension, Ascension Day, ascent, ascertainable, ascertainment, ascetic, ascetically, asceticism, ascorbic acid, ascribable, ascribe, ascription, ASEAN, asepsis, aseptic, asexual, asexuality, ash, ash blonde, ash plant, Ash Wednesday, ashamed, ashen,