addict: v. 使沉溺於(addict oneself to( = be addicted to) 沉溺於，熱中於)
in addition/加上, 又, 另外;in addition to/加上, 除...外;
additional adj.附加的, 另外的; 補充的
address n.收信(件)人的`住址 v. 對...講演或發表演說; (address a meeting 向大會致辭)
adequate adj. 足夠的,恰當的,勝任的 (be adequate for..勝任…)(adequate – enough –sufficient足夠的)
adjust v. 調整;調節; 使適應(adjust oneself to sth./ 使自己適應..)
admire v. 讚美;讚賞;(admire sb. for sth./因…而欽佩某人)
admit v. 讓...進入, 使獲得(某種地位或特權), 承認(事實、錯誤等) (admit sb. into the university/獲准入大學; admit sb. to hospital/把某人收治入院);
adopt v. 採用, 採納 (adopt –take採用)
adult n. 成年人 (adult –grown-up成年人)
advance v./n. 提高(物價等), 增加(數量、價錢等), 提前, 加速, 撥快(時針) (in advance/ 預先)(advance-increase增加(數量、價錢等) )
advantage n. 優勢, 長處, 利益, 便利 (take advantage of/ 利用，欺騙) (advantage - merit優點)
adventure n. 冒險, 驚險活動
advertisement n. 廣告(= ad.)
advice n. 勸告, 忠告(a piece of advice/ 一條意見; give advice /提出忠告; take/follow one's advice /接受忠告)
advise v. 建議, 提意見, 通知( advise sb. to do sth./ 勸某人做某事，advise sb. that../通知某人某事 = inform sb. that…)
age n. 年齡 v. 變老(at the age of…/ 時年..歲; be of age(= come of age/)成年 ;
ago adv. 以前，以往(long long ago很久很久以前, two days ago/兩天前);
agree v. 一致, 相合, 同意 (agree on…/對…意見一致; agree with sb. /同意某人的話; agree to do sth. 同意做… );
agreement n. 一致, 同意, 協議(in agreement with .../ 和..一致);
agriculture n.農業
ahead adv.在前, 向前, 提前( ahead of…/在…之前;超過);
aid v. 幫助, 援助 n. 幫助, 支援(aid sb. in sth./ 幫助某人做...);(aid – help幫助; aid –device輔助裝置)
aim v. (常與at連用)瞄準, 對準, 以…為目標n. 瞄準;目標(aim to do sth./ 致力於做。。;aim at doing sth./ sth. / 致力於做…) ;
air n. 空氣, 天空(fresh air /新鮮空氣; by air /乘飛機);
airplane n. 飛機;
airport n.航空站,機場 ;
alarm n. 驚恐，擔憂，報警器， 鬧鐘，警報v. 使擔心，使驚恐
alcohol n. 酒精;
alike adj. [常作表語]同樣的, 相似的(look alike/看起來相似)
alive adj. 活的，活著的( keep sth alive/ 讓。。仍然活著 );(比較: alive(活的)不能作定語, 只能作表語和補語; living(活的) 可以作定語, 如: a living scientist 一位仍然還在世的科學家)
