alternative

a.两者择一的 n.供选择的东西；取舍?

alphabetize, alpine, alpinist, already, alright, Alsatian, also, also-ran, altar, altar-piece, alter, alter ego, alterable, alteration, altercation, alternate, alternate angles, alternately, alternating current, alternation, alternatively, alternator, although, although (US also altho), altimeter, altitude, alto, altogether, altruism, altruist, altruistic, altruistically, alum, aluminium, aluminum, alumna, alumnus, alveolar, always, am,