April
April/ˈeipril/n.四月：April Fools’ Day愚人节He started work here last April.去年四月他开始在这里工作。The show opens next April.表演明年4月开始。
apron
apron/ˈeiprən/n.[c]围裙；挡板：Many people like to wear aprons while they are cooking.许多人做饭时喜欢系一条围裙。
apt
apt/ˈæpt/adj.1.恰当的，适宜的：an apt example (remark)恰当的例子(话) 2.(作表语，后接不定式)(习惯)易于…的，有…倾向的：Food is apt to deteriorate in summer.食物在夏天容易变质。［···
aptitude
aptitude/ˈæptitju:d/n.[c] & [u]恰当，智能，聪明：He had a remarkableaptitude forlearning words.他在学单词方面有惊人天资。The staff showaptitude formanagerial responsibility.工···
arbitrary
arbitrary/ˈɑ:bitrəri/adj.随心所欲的，专断的；武断的，任性的：A good judge tries to be fair and does not make arbitrary decisions.一个好法官要尽力公正，不能随意做出判决。Dictator···
arbitration
arbitration/ˌɑ:biˈtreiʃən/n. [u]（纠纷的）仲裁，公断：go to arbitration诉诸仲裁The wage disagreement is under arbitration.工资纠纷正在仲裁中。Both parties agreed to independen···
arc
arc/ɑ:k/n.［c］1.弧形(物)：an arc of 110? 110度的弧形2.弧(光)：arc furnace电弧炉；an arc lamp弧光灯；arc welding (电)弧焊
arctic
arctic /ˈɑ:ktik]/ I.adj.北极的，寒带的；极冷的：The explorers spent months in the Arctic wastes.探险家们在北极荒原上工作了几个月。The sort of animal lived in the Arctic Circle.这···
arch
arch/ɑ:tʃ/ I.n.［c］拱，拱门，拱形(结构)：an arch bridge拱桥；an arch roof拱形屋顶The bridge had 7 arches.那桥有七个桥洞。‖II.vt.&vi.（使）成拱形：The cat arched her back in···
arch(a)eology/arch(a)eologist
arch(a)eology/ˌɑ:kiˈɔlədʒi/ I.n.[u]考古学：She teaches archaeology at the university.她在大学教考古学。arch(a)eologist/ˌɑ:kiˈɔlədʒist/n. [c]考古学家：a research collect···
