advisable [Kd'vaizKbl] a. 可取的，适当的，明智的 【同】suitable; recommendable; judicious 【例】I am not in favor of long engagements. They give people the opportunity of finding out each other’s character before marriage, which I think is never advisable. 我不赞成订婚的时期太长。它使双方有机会在婚前摸清各自的人品，我认为这绝对不可取。

advocate ['<dvKkKt] vt. 拥护，提倡，主张 n. 1.拥护者，提倡者2.辩护者，律师 【同】uphold; support; defend; promote; advance: 【例】This judge is a strong advocate of prison reform. 这位法官是监狱改革的坚决拥护者。He advocates reducing military spending. 他主张削减军费开支。

aerial ['EKriKl] a. 1.飞机的，航空的，由飞机进行的 2.空中的，架空的 n. 天线 【例】He showed me some aerial photographs. 他给我看了一些空中拍摄的照片。

aerospace ['EKrKuspeis] n.航空和宇宙航行空间 【例】The aerospace industry in our country has developed greatly after liberation. 解放后，我国的宇航事业取得了巨大的发展。

aesthetic [i:s'Tetik] a. 1.美学的，审美的 2.悦目的，雅致的 【同】of or concerning beauty

affect [K'fekt] v. 影响, 假装 【例】The climate affected his health. 气候影响了他的健康。He was much affected by the sad news. 这个悲惨的消息使他非常难过。He affected not to hear me. 他假装没有听见我。In other aspects, computer affects people’s daily life and do harm to people. 在其他方面，计算机影响着人们的日常生活并导致了一些不利因素的产生。

affection [K'fekSn] n. 喜爱，感情，爱慕之情 【同】attachment; passion; zeal; love 【例】We should never judge those whom we love. The affection that is not blind is no affection at all. 不可评价所爱的人。不盲目的爱根本不是爱。Every mother has affection for her children. 每个母亲都爱她的孩子。He is held in affection. 他极为大家所爱戴。

affiliate [K'filieit] vt. 使隶属（或附属）于 n. 附属机构，分公司 【同】associate; unite; combine 【例】The hospital is affiliated to Beijing University. 这所医院附属于北京大学。

affirm [K'fK:m] vt. 1.断言，坚持声称2.证实，确认 【例】I affirm that what he said is true. 我断言他所说的是实情。They affirmed that the girl did quite a bit of reading. 他们断言这个女孩子读了不少书。

affirmative [K'fK:mKtiv] adj. 赞成的，肯定的 【同】positive; asserting; agreeing 【例】He gave an affirmative reply to my question. 他肯定地回答了这个问题。