acquit
acquit/əˈｋwit/vt.宣告无罪，脱卸义务和责任；还清（债务）：acquit a person of a charge宣告某人未曾犯被指控的罪He acquited himself well of his duty(promise).他很好地尽到了责任（履行···
acre
acre/ˈeikə/n.［c］英亩（=40.47 ares公亩，约4047m2)；土地，耕地；大量：broad acres宽广的土地；a many-acred park好几英亩大的公园The playground covers over an acre in extent.操场的面···
across
across/əˈkrɔs/ I.prep.1.横过，穿过(从一边到另一边)：walk across the bridge (street, road)走到桥(大街，马路)的对面；swim across the river游过河2.在另一边：He lives across the str···
act/action
act/ækt/ I.vi.&vt.1.做事，行动：Think before you act.三思而后行。2.演戏，扮演：She acts well.她演技很好。Who’s acting (the part of) Hamlet?谁扮演哈姆雷特? 3.起作用: By gravit···
activate
activate/ˈæktiveit/vt.使活动起来，使开始起作用：activate public opinion使舆论活跃起来; activate a system使系统起作用；to activate someone’s enthusiasm触发某人的热情We must activ···
active/activist/activity
active/ˈæktiv/adj.积极的，活跃的：be active in politics积极参加政治活动；still lead an active life in winter冬天仍过着活跃的生活；take an active part in积极参加activist/ˈæktivi···
actor/actress
actor/ˈæktə/n.［c］男演员: a bad (character, good, star) actor蹩脚(性格，好，明星)演员；professional actor专业演员An actor must be able to memorize his lines.演员须善于熟记台词。···
actual/actually/actuality
actual/ˈæktʃuəl,ˈæktjuəl/adj.实际的，真实的：the actual figures实际的数字What he told us was not a dream but an actual happening.他给我们讲的不是梦，而是一件真实的事。actual···
AD/ad
ADabbr.公元，耶稣纪元（Anno Domini的缩略形式）：Buddhism was introduced into China about 67 AD.佛教是在公元67年左右传入中国的。What will world population be by 2050 AD/AD 2050?到公···
acupuncture
acupuncture/ˈækjuˌpʌŋktʃə/ n. [u]针灸(疗法)：It’s known that acupuncture originated in China.众所周知,针灸起源于中国。He cured her by acupuncture.他用针灸疗法治愈了她。
