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　　

11. nerve　 神经　 lose one's nerve = lose one's courage 失去勇气　

　 have the nerve to do 有胆量做…

10. neglect one's duties 　neglect one's meals and sleeps 废寝忘食 　neglect to do = forget to do

9. negative　 否定的，消极的，give a negative answer 否定回答　 negative criticism 消极批评