221. transparent   adj.  透明的，显然的

　　The transparent curtains will never keep the light out.

　　The box has a transparent lid.

　　He laughed at our transparent attempt.

　　His writing style is transparent.

　　222. tremble  v.  战栗，发抖   shake

　　I tremble at the very thought of it.

　　我一想到这件事就不寒而栗。

　　We can see the leaves trembling in the breeze.

　　His voice trembled with anger.

　　The little boy trembled with cold.

　　His hands trembled as he lit the cigarette.

　　223. trifle   n. 琐事，小事  small things

　　He wastes his time on trifles.

　　It’s silly to quarrel over trifles.

　　The lost ring was only a trifle.

　　Trifles made him lose his temper.

　　224. tuck  v.  塞，掖

　　She tucked her scarf into her collar.

　　她把围巾塞进衣领内

　　She tucked her hair behind her ears.

　　I tucked my bag under my arm

　　She tucked the blanket around the child.

　　A bird tucks his head under his wing when he sleeps.

　　tuck away  藏起来，存放

　　tuck in 塞进

　　tuck into 开始吃喝

　　tuck up 卷起，安顿好

　　The map is tucked away in a pocket at the end of the book.

　　She had a lot of money tucked away.

　　Tuck the shirt in.

　　He tucked into the cold ham.

　　They tucked up their sleeves and began working.

　　225. tumble  v.  翻倒，摔倒

　　The old lady tumbled down the stairs.

　　Babies tumble when they are learning to walk.

　　I tumbled off my bicycle yesterday.

　　The accident tumbled all the passengers out of the bus.

　　The puppies tumbled were tumbling about the floor.

　　226. ultimate   adj.  最终的，最后的

　　The ultimate goal is to realize communism.

　　We are looking forward to the ultimate victory.

　　The ultimate responsibility lies with the president.

　　Scientists are searching for the ultimate truths.

　　227. undermine  v.  破坏

　　Late hours can undermine one's health.

　　晚睡能损害健康

　　The waves undermine the cliff.

　　The road is undermined by a stream.

　　Her jealousy undermined their friendship.

　　He undermined my authority by allowing the child to do what I have forbidden.

　　228. unintelligible  adj.  难解的，无法了解的，莫名其妙的  not understandable

　　His remarks were unintelligible.

　　The code was unintelligible to anyone who didn’t have the key.

　　He read us an unintelligible prose passage.

　　She was crying so hard that her words were unintelligible.

　　229. unprecedented   adj.  空前的， 史无前例的

　　Customers came in unprecedented numbers.

　　We had unprecedented rainfall last summer.

　　They achieved the unprecedented victory.

　　230. unveil   v.  使公诸于众，揭开，显露

　　Several new models were unveiled yesterday at the Motor Show.

　　The truth of the event was unveiled.

　　231. vague   adj.  含糊的，不清楚的  unclear

　　He had the vague idea about the world.

　　The skyscraper was a vague shape in the fog.

　　My plan is rather vague at the moment.

　　His answer is too vague.

　　232. vanish   vi.  消失，突然不见  disappear

　　The thief ran into the crowd and vanished from sight.

　　His prospects of success have vanished.  (引申意义)

　　The sun vanished behind a cloud.

　　233. venture   v.  冒险，斗胆

　　He ventured his life to save the drowning boy.

　　She decided to venture all her money on the shares.

　　They should venture on the river in such a small boat.

　　No one ventured to interrupt the speaker.

　　I ventured to put forward a proposal at the meeting.

　　venture on /upon 冒险进行某事

　　You should never have ventured on such a journey.

　　The hope of making further discoveries led them to venture upon a second voyage.

　　234. verify   vt.  检验，查证，核实  prove

　　They conducted experiments to verify the hypothesis.

　　We have verified the figures of a report.

　　I looked up the word in the dictionary to verify its spelling.

　　Later findings verified the scientist’s theory.

　　235. vertical   adj.  垂直的，直立的

　　The hillside looked almost vertical.

　　The walls of the room are vertical.

　　He is standing up in a vertical position.

　　236. vicious  adj.  恶意的，刻毒的，有毒的   poisonous

　　That is the vicious gossip.

　　He refused to accept the vicious criticism

　　He made a vicious story about her.

　　237. virus   n.  病毒

　　He is suffering from a virus infection.

　　The doctors are looking for a specific medicine to control this virus.

　　Viruses reproduce only in living cells.

　　It is said a new kind of virus will destroy the computer program.

　　238. vow   v.  宣誓，立誓   state

　　He vowed to revenge the insult.

　　She vowed never to speak to him again.

　　They were forced to vow obedience.

　　She vowed that she would love him forever.

　　239. wary   adj.  机警的 careful

　　We are asked to keep a wary eye on the thieves.

　　The children are taught to be wary of strangers.

　　240 wrap  v.   包装，包起来

　　She wrapped a blanket around the child.

　　You’d better wrap a clean cloth around your arm till the wound closes.

　　I like to wrap Christmas presents in pretty paper.

　　She wrapped the cakes in paper.

　　be wrapped in  由…裹着，穿着, 处于…状态

　　be wrapped up in  专心致志于,  沉陷在…中; 被…所吸引

　　wrap up   包起来，包好，把…藏在里面，完成

　　wrap up in 用…包起来

　　The baby was wrapped in wool clothes and was too hot on such a sunny day.

　　The valley was wrapped in a dense fog.

　　The whole business is wrapped in mystery.

　　He is wrapped up in his scientific studies.

　　She is so wrapped up in him that she can’t see his faults.

　　If you wrap the books up for me, I’ll take them to the post office.

　　He wrapped up his meaning in the speech.

　　Let’s wrap up the job and go home.

　　The glasses were wrapped up in soft paper.

　　The old man was wrapped up in a fur coat.

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