applaud vi. 鼓掌，喝彩Vt. 向-鼓掌喝彩;称赞，赞许
appraisal n. 估计，估量;评价
appreciable a. 大的可以看到或察觉到的，相当可观的
apprehension n. 忧虑，担心，疑惧;理解，领悟
apt a. 恰当的，适宜的;易于-的，有-倾向的
arc n. 弧形物，弧
arch n. 拱，拱门，拱形v. 使成拱形
architect n. 建筑师;设计师，缔造者
arctic n. 北极，北极圈a. 北极的，北极地区的
array n. 一系列，大量;排列，阵列vt. 排列
articulate a. 善于表达的，口齿清晰的vt. 明确有力地表达
ascend vi. 渐渐上升，升高vt 攀登，登上
ascertain vt 查明，弄清，确定
ascribe vt 把-归因于;把-归属于
assault n/vt 武力或口头上的攻击，袭击
assert vt 肯定地说，断言;维护，坚持 oneself 坚持自己的权利或意见，显示自己的权威
asset n 宝贵或有益的人或物，优点，长处 资产
assimilate vt 吸收，消化;使同化vi 被吸收，被消化;被同化
assumption n 假定，臆断;担任承担
assurance n 保证，表示保证或鼓励的话;把握，信心;保险
astronomy n 天文学
athlete n 运动员
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