A: I do not think I have achieved enough yet.
B: Well, if you always aspire to do your best then you will not be unhappy.
aspire
vi.渴望，追求，有志于
A: Is that a donkey or an ass ?
B: Neither, it is a small horse.
ass
n.1.笨蛋，傻瓜 ;2.驢
A: Did you hear that there was an attempted assassination on the president?
B: Yes, but it was not true, somebody was spreading rumours.
assassination
n.刺殺，暗殺
A: We were warned about the risk of assault in the city.
B: Good, it is always better to be aware of the dangers.
assault
vt.(武力或口頭上的)攻擊，襲擊
A: He asserted his points strongly during the debate.
B: Why didn’t he win it then?
assert
vt.1.肯定地說，斷言 2.維護(hù)，堅持
A: I think that guy is too rude.
B: Really, I think he is just trying to assert himself .
assert oneself
堅持自己的權(quán)利，顯示自己的權(quán)威
A: I think that the new student has assimilated well into his new environment.
B: Perhaps, but he does not seem to have many friends.
assimilate
vt. 1.吸收，消化；2.使同化
vi. 1.被吸收，被消化；2.被同化
A: I gave Linda an assorted box of sweets for her birthday.
B: Did you not know that chocolates were her favourite?
assorted
a. 1.各種各樣的，混雜的，什錦的
A: I received assurances that I would get help.
B: And did they come through?
assurance
n. 1.把握，信心；2.保證，表示保證（或鼓勵、安慰）的話；3.（人壽）保險
A: I am not able to run fast because I suffer from asthma .
B: Don’t worry, I can’t run fast either because I am unfit!
asthma
n. 氣喘，哮喘
A: It is my dream to be an astronaut one day.
B: I too would love to see the earth from space.
astronaut
n. 宇航員
A: I am going to visit the new astronomy research centre in town tonight, would you like to join me?
B: I’d love too, is there a good telescope to view the stars with?
astronomy
n. 天文學(xué)
A: They are closing down the local asylum .
B: It is about time, the care facilities there were terrible.
asylum
n. 1.庇護(hù)，政治避難；2.精神病院
A: Do you have an atlas ? I want to check where and in which ocean the Tongan Islands are.
B: No, I don’t have one, but I think that they are in the Pacific.
atlas
n. 地圖集
A: Is attendance at the lecture absolutely necessary?
B: Well, if you want to get credit for this course it is.
attendance
n. 1.出席人數(shù)；2.出席，參加，出席次數(shù)；3.護(hù)理，照料
A: I lost my wallet at the cinema yesterday.
B: Did you ask the attendant on duty if it was found?
attendant
n. 服務(wù)人員，侍者，隨從
a. 伴隨的，隨之而產(chǎn)生的
A: The box of old photos that you are looking for is in the attic .
B: On the right or left hand side?
attic
n. 閣樓
A: The auction will be held at 3pm on Saturday.
B: Good, I’d like to set a starting price of one hundred dollars for my table.
auction
n./vt. 拍賣
A: Even though I’m not registered in this department, will it be alright if I audit your classes?
B: It is fine with me, but it is best to check with the department first.
audit
vt. 審計，檢查（帳目）
A: Are all the accounts from your business in order?
B: No, the auditor still needs to check them.
auditor
n. 審計員，稽核員
A: Where will the classical concert be held?
B: In the main auditorium
auditorium
n. 1.觀眾席，聽眾席；2.禮堂，會堂
A: He is suffering from an auditory infection.
B: I hope he recovers soon.
auditory
a. 聽覺的，聽覺器官的
A: My salary will be augmented with the aid of extra hours.
B: Great, but don’t work too hard.
augment
vt. 擴(kuò)大，增加，提高
A: I attended a memorial service last night.
B: It must have a very austere occasion.
austere
a. 1.樸素的，無裝飾的；2.嚴(yán)峻的，一絲不茍的；3.十分簡樸的，苦行的
A: Are you jeans authentic ?
B: No, they are just cheap copies of the original brand.
authentic
a. 1.真的，真正的；2.可靠的，可信的
A: John has such an authoritative voice. It is frightening.
B: I find him scary at times also.
authoritative
a. 1.權(quán)威性的，可信的；2.專斷的，命令式的
A: Stop! You are not authorized to enter this section of the building.
B: Oh, I’m sorry, I didn’t realize that I needed special permission.
authorize
vt. 授權(quán)，批準(zhǔn)
A: What are you reading?
B: Nelson Mandela’s autobiography , I highly recommend it.
autobiography
n. 自傳
A: Is that dog over there real?
B: No, I think that it is just an automation
automation
n. 自動化（技術(shù)），自動操作
A: I am moving to an autonomous region of the country.
B: Gosh, that will be an interesting experience.
autonomous
a. 1.自治的；2.獨立自主的
A: You are very independent.
B: My autonomy is protected by the law.
autonomy
n. 1.自治，自治權(quán)；2.人身自由，自主權(quán)
A: Where you able to get through to the ticket office when you telephoned?
B: I tried several times, but to no avail.
avail
n. [一般用于否定句或疑問句中] 效用，利益，幫助
A: What was the film about?
B: A guy trying to avenge the killing of his brother. It was quite violent.
avenge
vt. 1.為…復(fù)仇，報…之仇；2.(on)向…報仇
A: Let’s turn left down the next road.
B: Good idea, that way we can avert the traffic jam.
avert
vt. 1.防止，避免；2.轉(zhuǎn)移（目光、注意力等）
A: I heard that the national aviation company owes a lot of money to the government.
B: Well, it must be because of the price of new planes.
aviation
n. 1.航空，航空學(xué)；2.飛機(jī)制造業(yè)
A: I was filled with awe when I watched the sun rise this morning.
B: It is a shame that I missed it, I was still in bed.
awe
n. 敬畏，驚懼
vt. 使敬畏，使驚懼
be / stand in awe of 敬畏
A: At what speed does the earth spin on its axis ?
B: I am not quite sure, you should check in your textbook.
axis
n. 1.軸，軸線，中心線；2.坐標(biāo)軸，基準(zhǔn)線