challenge
名词 n.1.挑战；邀请比赛[c][+to-v] he received a challenge to a tv debate. 他接到电视辩论的挑战。
2.质疑；指责；异议[c]
3.颇有作为的工作；艰巨的事[c]
to build a road in the mountainous area was a real challenge. 在山区修筑公路确是艰巨的事。
he wants a career that offers a challenge. 他要有挑战性，能有一番作为的事业。
4.(哨兵，警卫等)查问口令；盘问[c]
i was met with a challenge when approaching the post. 我在走近哨所时被查问身份。
5.【律】(对某陪审员出庭等表示的)反对[c] 6.有挑战性[u]
及物动词 vt.
1.向。挑战[(+to)][o2] i challenged him to show his proof. 我要他拿出证据。
2.对。提出异议；怀疑；反对
he challenged my view on that matter.
他就我对那件事的看法提出异议。
3.要求，需要；刺激，激发[o2]
the new position challenged him to study still harder during his spare time.
那个新职位激发他在业余时间更加努力学习。
the event challenges an explanation. 那个事件需要解释。
4.(哨兵，警卫等)查问；盘问 5.【律】宣布反对(某陪审员等)
tension
名词 n.1.拉紧，绷紧[u] the tension was so great that the rope broke. 绳子拉得太紧绷断了。
2.(精神上的)紧张[u] he is suffering from nervous tension. 他正受神经紧张之苦。
3.紧张局势，紧张状况[p1][u]
she felt the tension as soon as she entered the room. 她一进房间就感觉到了这种紧张气氛。
4.【物】张力[u] 5.【电】电压[u] danger! high tension wires. 危险！高压电线。
及物动词 vt.
1.使拉紧；使绷紧；使紧张。
destroy
及物动词 vt.
1.毁坏，破坏 a fire destroyed the house. 一场火毁坏了那座房屋。 2.杀死，消灭。
3.打破(希望、计划);使失败
what he said destroyed our last hope. 他说的话摧毁了我们最后的希望。
planet
名词 n.1.行星[c] the planets move around the sun. 行星绕着太阳转。
automatically
副词 ad.
1.自动地。
some doors h**e locks which automatically lock the doors when we close them.
有些门上的锁在关门时会自动把门锁好。
2.无意识地，不自觉地，机械地。
bearbear1
及物动词 vt.
1.支持，承受；承担 mrs. ann bader bears all expenses. 安妮·巴德太太承担一切费用。
2.运送；携带；带走[o]
3.忍受；经得起[+to-v][+v-ing][+that][o2]
he could not bear that his friends should laugh at him. 他受不了朋友们竟也嘲笑他。
i can't bear to see you like this. 我不忍见你这样。
i don't feel very well. i can't bear this weather.我感到不太舒服。我受不了这种天气。
4.容许 5.佩带；拥有；具有 6.写有，印有，带有 her face bore signs of tears. 她的脸上带着泪痕。
7.怀有，对。抱有[o1][(for/against)]
8.生(小孩)[o1];开(花);结(果) she has borne five children.她生了五个孩子。
9.产(庄稼);生(利息) 10.值得，需要 11.(与oneself连用)表现[o]
不及物动词 vi.
1.承受重量(或压力) those bamboo beams will not bear. 这几根竹制的横梁承受不住压力。
2.用力推(或挤，压)
3.开花结果 our apple trees will bear well this year. 今年我们的苹果树会结许多果实。
4.(依一定方向)延伸。
bear2名词 n. [c]1.熊；似熊的动物 2.鲁莽的人；笨拙的人。
3.【美】【俚】佼佼者 he is a bear at mathematics.他是个数学天才。
4.(**中)做空头者；(对**)看跌者。
及物动词 vt. 1.通过卖空使****。
不及物动词 vi. 1.做空头。
形容词 a. 1.卖空的，****的[z][b]
regard
名词 n.1.注重，注意；考虑；关心[u][(to/for)]
no one showed the least regard for his feelings.没有人关心他的感受。
2.尊敬；尊重；器重[u][s1][(for)]
i h**e a very high regard for your abilities. 我非常器重你的能力。
3.注视，凝视[u] 4.关系，事项[u] she was lucky in that regard. 在那件事上她很幸运。
5.问候，致意[p] please give my best regards to your parents. 请代我向您的双亲问好。
及物动词 vt. [w]
1.把。看作，把。认为[(+as)]
he is regarded as the best doctor in town. 他被公认为城里最好的医生。
2.(常用于否定句)注重，注意，考虑 you seldom regard my advice. 你很少考虑我的劝告。
3.尊敬，尊重[o] she regards her teacher highly. 她很尊重她的老师。
4.看待；注视，凝视[o][(with)]
denny regarded his uncle with wide eyes. 丹尼睁大双眼凝视他的伯伯。
5.与。有关 this does not regard me at all. 这与我毫无关系。
不及物动词 vi. 1.注重，注意 2.注视。
require
及物动词 vt. [w]
1.需要[+v-ing][+that] the roof requires repairing. 屋顶需要修理了。
this project will require less money. 这项工程所需的投资较少。
2.【书】要求，命令[(+of)][o2][+that]
the director required that we should work all night. 主任要求我们通宵工作。
focus名词 n.
1.焦点，焦距；聚光点[c]
he took out the binoculars and adjusted the focus. 他取出双筒望远镜并调整了焦距。
2.调焦；聚焦[u] 3.成像清晰点；(图像的)清晰；明确[u]
4.(注意，活动等的)中心，集中点；重点[the s][(of)]
the focus of this chapter is the american revolution. 本章的重点是讲美国独立战争。
she always wants to be the focus of attention. 她老想成为人们注意的中心。
5.(**等的)震源；病灶。
the focus of the earthquake is eighty miles from our city.
这次**的震源在距我市八十英里的地方。
及物动词 vt.
1.使聚焦[(+on)]
2.调节(镜头等)的焦距[(+on)]
you can focus your telescope on that distant television tower.
你可以对着那座远方的电视塔调节望远镜的镜头。
3.(调节镜头的焦距)使(图像等)清晰。
4.使集中[(+on)]
i can't focus my thoughts today. 今天我的思想集中不起来。
不及物动词 vi.
1.聚焦。a defect of vision prevented him from focusing accurately. 视力上的缺陷使他不能准确对焦。
2.调节焦距[(+on)] 3.集中[(+on)] the beams of light moved across the sky and focused on the plane.
光束在空中移动，集中对准飞机。
effort
名词 n.1.努力，尽力[u][c][+to-v] i decided to make one more effort. 我决定再作一次努力。
his efforts had no smallest chance of success. 他的努力毫无成功的希望。
2.努力的成果；成就[c] his recent novel is a fine literary effort. 他新近的**是一本文学佳作。
section a
prepare
及物动词 vt.
1.准备；使。准备好[(+for)][o2]
they prepared themselves for the worst. 他们作了最坏的打算。
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