1.average n. 平均散，平均 adj．1．平均的2．通常的，一般的 v. 平均，平分
on an average of 平均...(the average level is...)
例句：Tuition at most American universities will be on an average of 9 percent higher this year than last．
今年大多數(shù)美國大學(xué)的學(xué)費(fèi)都比去年平均提高了9%。
2.mistake n. 弄錯(cuò)，錯(cuò)誤，搞錯(cuò) v. 弄錯(cuò)
mistake...for... 錯(cuò)誤地把…當(dāng)作…
例句：Excuse me, mistook you for somebody else．
對(duì)不起，我認(rèn)錯(cuò)人了。
typing mistakes 打印錯(cuò)誤
例句：Do you look over your own papers for typing mistakes?
你檢查自己論文的打印錯(cuò)誤了嗎？
3.per prep. 每個(gè)；根據(jù)；按照
per se <拉>本質(zhì)上，本身(in itself)
A: You don't believe in diets, do you?
你不太相信節(jié)食，是不是？
B:There is nothing wrong with them per se but they have to combine with exercise to do any good．
節(jié)食本身沒什么問題，但得跟鍛煉結(jié)合起來才會(huì)有用。
on an average of 平均...(the average level is...)
例句：Tuition at most American universities will be on an average of 9 percent higher this year than last．
今年大多數(shù)美國大學(xué)的學(xué)費(fèi)都比去年平均提高了9%。
2.mistake n. 弄錯(cuò)，錯(cuò)誤，搞錯(cuò) v. 弄錯(cuò)
mistake...for... 錯(cuò)誤地把…當(dāng)作…
例句：Excuse me, mistook you for somebody else．
對(duì)不起，我認(rèn)錯(cuò)人了。
typing mistakes 打印錯(cuò)誤
例句：Do you look over your own papers for typing mistakes?
你檢查自己論文的打印錯(cuò)誤了嗎？
3.per prep. 每個(gè)；根據(jù)；按照
per se <拉>本質(zhì)上，本身(in itself)
A: You don't believe in diets, do you?
你不太相信節(jié)食，是不是？
B:There is nothing wrong with them per se but they have to combine with exercise to do any good．
節(jié)食本身沒什么問題，但得跟鍛煉結(jié)合起來才會(huì)有用。