•The average of the three numbers 7, 12 and 20 is 13, because the total of 7, 12 and 20 is 39, and 39 divided by 3 is 13.7、12和20这三个数的平均数是13，因为7、12和20的和是39，而39除以3是13。

•Prices have risen by an average of 4% over the past year.物价与去年相比平均上涨4%。

•My income's rather variable, but I earn £73 a day on average.我的收入很不稳定，但是平均每天赚73英镑。

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•The audience figures were lower than average for this sort of film.对于这种类型的电影而言，这样的观众人数是低于一般水准的。

•In western Europe, a 7- to 8-hour working day is about the average.在西欧，一天工作七到八小时基本是平均水准。

•The quality of candidates was (well) below/above average.这些候选人的素质（大大）低于／高于一般水准。

•I expect to spend an average of $15 to $20 on a meal in a restaurant.我去餐厅吃饭，一般一顿饭也就想花15到20英镑。

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•Enquiries to our office average 1000 calls a month.我们办公室每个月平均接到1000个询问电话。

•Many doctors average (= work an average of) 70 hours a week.很多医生每周平均工作70个小时。

•Trainee accountants average (= earn an average of) £12 000 per year.实习会计师平均每年收入12 000英镑。

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•If I average out what I earn a month, it's about one and a half thousand pounds.如果要算算我每月平均赚多少钱的话，大约是1500英镑吧。

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•The highs and lows of life tend to average out in the end.人生一世，往往起起落落，到头来还算公道。

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•My annual holiday varies, but it averages out at five weeks a year.我每年的假期时间长短不等，但是平均算来是每年5周。

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•average earnings/income/rainfall平均工资／收入／降雨量

•The average age of the US soldiers who fought in the Vietnam War was 19.参加越南战争的美国士兵平均年龄是19岁。

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•The average person in the street is a lot better off than they were forty years ago.再普通再一般的人也要比40年前富裕多了。

•a student of average ability才智平平的学生

•The food was fairly average (= not excellent, although not bad).那里的食物很一般。