alive

a.活着的，存在的；有活力的，活泼的

algebra, algebraic, algebraically, Algeria, Algerian, ALGOL, algorithm, alias, alibi, alien, alienate, alienated, alienation, alight, align, alignment, alike, alimentary, alimentary canal, alimony, alkali, alkaline, alkalinity, all, all along, all at once, all but, All Fools' Day, all in all, all of a sudden, all one's life, all out, all over, all over again, all right, all risks, all round, All Souls' Day, all the more, all the same,