alongside  prep. 在…旁边  [同]beside  adv. 并排地,并肩地  alteration  n. 改变,变更  [同]modification  alternate  v. 轮流,使交替发生  We alternate in cleaning the room. 我们轮流打扫房间。  adj. 交替的,轮流的  Tom and Harry do the work on alternate days. 汤姆和哈里隔日轮流做这工作。  amateur  n. 业余爱好者,业余运动员  [反]professional  adj. 业余的  an amateur painter 业余画家  [反]professional  ambassador  n. 大使 the British Ambassador to China 英国驻华大使  ambient  adj. 周围的,包围着的  [同] surrounding  ambiguous  adj. 模棱两可的,含糊的  His answer was ambiguous. 他的答复很含糊。  [同]vague