ascendancy (also ascendency)

n [U] ~ (over sb/sth) (position of) having dominant power or control 有支配的力量或控制力（的地位）: He has (gained) the ascendancy over all his main rivals. 他（获）有压倒一切主要对手的优势.

as regards, as soon as, as soon as possible, as sure as fate, as the saying goes, as though, as to, as usual, as well, as well as, as yet, as...as, as...as possible, as...as..., ASA, asap, asbestos, asbestosis, ascend, ascendancy, ascendant, ascendant (also ascendent), ascension, Ascension Day, ascent, ascertain, ascertainable, ascertainment, ascetic, ascetically, asceticism, ascorbic acid, ascribable, ascribe, ascription, ASEAN, asepsis, aseptic, asexual, asexuality,