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　　attic
　　n. 阁楼
　　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. 拍卖
　　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. 审计，检查(帐目)
　　A: Are all the accounts from your business in order?
　　B: No, the auditor still needs to check them.
　　auditor
　　n. 审计员，稽核员
　　A: Where will the classical concert be held?
　　B: In the main auditorium
　　auditorium
　　n. 1.观众席，听众席;2.礼堂，会堂
　　A: He is suffering from an auditory infection.
　　B: I hope he recovers soon.

　　auditory
　　a. 听觉的，听觉器官的
　　A: My salary will be augmented with the aid of extra hours.
　　B: Great, but don’t work too hard.
　　augment
　　vt. 扩大，增加，提高
　　A: I attended a memorial service last night.
　　B: It must have a very austere occasion.
　　austere
　　a. 1.朴素的，无装饰的;2.严峻的，一丝不苟的;3.十分简朴的，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.权威性的，可信的;2.专断的，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. 授权，批准
　　A: What are you reading?
　　B: Nelson Mandela’s autobiography , I highly recommend it.
　　autobiography
　　n. 自传
　　A: Is that dog over there real?
　　B: No, I think that it is just an automation
　　automation
　　n. 自动化(技术)，自动操作
　　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.独立自主的