21. Not at all. 别客气。　　　 not only ... but also 不仅…而且…　

not ...but... 不是…而是　　 not that ... but that ... 不是(因为)…而是(因为)…

20. talk nonsense　 胡说　　 talk business　 谈正经事　

make nonsense of　 搅乱　 The depression made nonsense of our plan.

19. None of the students is/are ... none but 只有　 They choose none but the best.他们只挑最好。　　　　　　 none other than 不是别人正是…　　 He is none other than our headmaster.

18. nod at sb 朝…点头　　　 He nodded at me to continue. 他点头示意我继续。

17. noble　 高尚的；宏伟的a man of noble birth 出生高贵的人　 a noble building 宏伟的建筑

16. I have no money to buy books.　　 He is no artist.他算不上一个艺术家。　 say no to　 否认

He is no friend of mine. 他不是我朋友。　　 There is no denying that ... 无法否认…

It is no use/good doing ...　　 in no time 马上　　　 no wonder 怪不得　　　 no longer 不再

no doubt 无疑　　　 I have no doubt that ...　　　 There is no doubt that ...　　

no more than 两者都不　　 had no sooner… than 一…就…

no　 并非　　　　 It is no easy work.　　　　　 We have no such luck.

15. at night　　 by night 利用黑夜　　　　 Have a good night . 睡好

14. nevertheless 不过；仍然　 in spit of that　 = nonetheless

　　　　 There was no news; nevertheless we went on hoping.

13. net　 网， 净余的　　　 net weight 净重　　　 net profit 净利润

12. nervous　 神经紧张的　　 be nervous about