80,on the dot =准时,正点
　　-Did you and a man Amanda really meet exactly five minutes to two in front of the theater?
　　Yes, we were both there on the dot
　　81,on earth =究竟,到底
　　-How on earth can you believe that?
　　82,on end = 连续,没完没了的
　　-Did Linda ever finish that introductory chapter?
　　I am not sure; she spent hours on end rewriting it
　　83,on one's own =独立的,凭自己的力量
　　-She learned to use the computer on her own
　　84,on sale =减价
　　-Did you buy any of the sweaters that were on sale?
　　Buy any, I got five of them, there were such a good bargain
　　85,on campus =在校内
　　-Michel is the most talented actor on campus
　　Isn’t he though?
　　86,on the side =兼职,副业
　　-He has a job on the side preparing a libratory every day for the next experiments
　　87,once and for all =最后一次,干脆
　　-I am going to tell that neighbor of mine to turn down that music once and for all
　　I see why you are angry, but I've always found that the polite route is the most effective
　　88,out of =缺乏,没有
　　-I'd like to buy a copy of professor Franklin's book on shelves shells(贝壳)
　　I am very sorry, that you’ve been out of print for some time now
　　-The bookstore is out of textbooks for France 102
　　-How can we be out of salt, I bought them only last week
　　-The bookstore is out of lined notebook paper 划线的笔记本
　　89,out of business =停止,停产
　　-The supermarket down the street is selling everything half price because they are going
　　Out of business
　　Sounds like an idea time to stock up on coffee
　　90,out of earshot = 不在听力所及范围
　　-Hey, Joe, Joe, save your breath
　　He’s out of earshot
　　91,out of it =神情恍惚,心不在焉
　　-Peter's really out of it these days
　　Yeah I know, ever since he met Anne, he’s been in another world
　　92,out of one's mind =神经失常
　　-Gerry says he's planning to take an extra course this term
　　He’s got to be out of his mind
　　93,out of place =场合不合适,不合时宜,不恰当
　　-Just look at that new dormitory, the modern architecture seems so out of place among all the older buildings
　　94,pick up =1,中途搭人或带货
　　-Have you picked up your ID card from the office yet?
　　No the camera for taking photos was broken
　　-Should we ask Paul to pick up our clothes at the dry cleaners?
　　Why not, it’s right on his way home
　　-Professor Corks said you could pick up your term paper today at her office
　　So she's graded it
　　-I hope you had a chance to pick up those financial aid papers
　　I thought I get day to do it later
　　-I thought you were picking David up at the airport
　　How could air on Tuesday night
　　-I'd like to pick this film up by four-tomorrow afternoon
　　I can have it for you at two if you like
　　-I'm going to the vegetable stand(蔬菜店) today, can I pick up anything for you
　　No thanks; I just came back from the market myself
　　-We’ve got a whole hour before the Browns come to pick us up
　　Yeah, but we better get moving
　　-I am going to the snack bar for a couple of coffee
　　Would you like me to bring you back something?
　　Not from the snack bar, but could you pick up a paper for me
　　= 2,拾起,捡起
　　-One team will pick up litter in the picnic area and jogging trail and one will dig out
　　Garbage found in the sallow shallow (浅的) waters of the lake itself
　　=获得,学会
　　-I know Lorry play the piano but I didn't know she plays the Guitar
　　Neither did I, It seems she just picked it up on her own over the summer
　　95,out of the question =不可能的,办不到的
　　-Could I hand in my paper a few days late?
　　I am afraid that's out of the question
　　96,out of this world =非常好
　　-Have you tried Susan's apple pie?
　　I got the last piece, and it was out of this world
　　97,pass up =错过
       I 'm sure my advisor wouldn't want me to pass up this opportunity
　　98,pay off =证明是成功的,有好处的或值得的
　　-What a wonderful performance, the marching band has never sounded better
　　Thanks; I guess all those hours of practice are finally paying off
　　99,out of steam =没有力气,泄气,渐渐停止
　　-Let’s jog for another mile
　　I'll try, but I am running out of steam