n. 危险，风险：There is the risk of your catching cold.

vt. 使遭受危险，冒…的危险：Did you ever think that you were risking your life?

at risk处境危险

at the risk of冒着…的危险

23. secure

a. 安全的：evacuate the wounded to a secure place 把伤员转移到安全的地方去

vt. ①(against)保卫，防卫：

build breakwaters to secure a harbor against waves修筑防堤使港口免受浪潮冲击

②得到，获得：Perfect teamwork secures a better performance.

24. seek

vt./vi. ①寻找，探索：seek after the truth寻找真理

②企图，试图：They sought to punish him for his crime but he escaped.

③征求(意见)，请求(帮助)：You should seek advice from your lawyer.

25. sensation

n. ①感觉，知觉：I had the sensation that I was being watched.

②轰动，轰动一时的事情：The new invention has created a great sensation.

26. separate

a. ①分开的：Cut it into three separate parts.

②单独的，独立的：I want a separate room.

vt./vi.①(使)分离：Theory should by no means be separated from practice.

②区分：It is not difficult to separate a butterfly from a moth.

27. settle

vt./vi. ①安排：Let's settle the date of the meeting.

②安放：She settled herself in an armchair.

③定居：be settled in the countryside在农村定居

④解决：The internal affairs of each country should be settled by its own people.

settle down定居，过安定的生活

settle for勉强认可: She had to settle for an unskilled job because there was no work for people with her

qualifications.

settle in/into在新居安顿下来;适应新环境(新工作)

settle on/upon选定，决定

settle up付清(欠款等)，结清(账目)

settlement n. ①解决：the settlement of an issue问题的解决

②清账，结算：I enclose a cheque in settlement of your claim.

28. shatter

v. ①粉碎，破碎：I dropped the mirror on the floor and it shattered.我把镜子掉到地上摔碎了。

②使震惊：We were shattered to hear of her sudden death.听到她突然死了，我们都感到震惊。

③精疲力竭：I feel completely shattered after that run up the hill.我跑上小山之后，感到筋疲力尽。

29. shift

vt./vi. ①移动：He shifted impatiently in his seat during the long speech.在听冗长的报告时，他不耐烦地在座

位上挪来挪去。

②转换，转变：The wind has shifted to the north.

③推卸，转嫁：Don't try to shift the responsibility on to others.

n. ①转换，转变：The plan shows a shift in emphasis.

②(轮)班，(换)班：work in three shifts分三班工作

30. sketch

n. ①草图，略图：He made a sketch of the railway system in this province.

②概略，梗概：He gave me a sketch of his plans.

vi./vt.①画草图，素描：be sketched directly from nature直接从大自然写生

②(out) 草拟：sketch out a plan草拟计划

31. spectacular

a.壮观的，引人入胜的：a spectacular firework display颇为壮观的烟火表演

n.壮观的演出，惊人之举

32. speculate

vi.①(about，on)推断，推测：speculate upon the origin of the universe推究宇宙的起源

②投机，做投机买卖：speculate in stocks做股票投机

33. speed

n.①快，迅速：It's dangerous to corner at speed.

②速度，速率：If he can maintain this speed, he will win the race.

vt./vi. (sped，sped)①速进，急速行进：The boy sped down the street.

②(up)加速：The heart speeds up.

speed up使加速

34. spread

vt./vi. (~，~)①伸开，展开：The bird spread its wings.

②传播，散布：spread news散布消息

③涂，敷：The colour is not evenly spread.

n.传播，蔓延：the spread of education教育的普及

spread out(人群等)散开;延伸

35. spur

n.激励，刺激(物)：This book is a spur to the child's imagination.

vt./vi. (-rr-)鞭策，刺激：She spurred her team on to greater efforts.她鼓励她的队作出更大的努力。

on the spur of the moment一时冲动之下，当即

36. state

n.①状态，状况：I'm very concerned about the state of her health.我非常关心她的健康状况。

②国家，政府：a neutral state 中立国 ③(常作 State) (美国等的)州

vt.陈述，阐明：He stated that he didn't agree with the proposal.

37. stimulating

adj.①使人振奋的：

I find swimming the most stimulating form of exercise.我发现游泳是最令人振奋的锻炼方式。

②起激励作用的：

We had a most stimulating conversation.我们进行了一次颇有启发性的谈话。

38. submit

vt.①屈服，认输: He was losing the fight but he would not submit.他在拳击中正节节败退，但是他并不服输。

②提交，提出建议：We are submitting the proposal to the committee for their approval.我们把建议提交委

员会审批。

39. sufficient

a.充分的，足够的：There was sufficient food for everybody.有足够所有人吃的食物。

40. superb

a.①宏伟的，壮丽的：a superb building壮丽的建筑

②高质量的，极好的：The food was superb.