1、Unit 4 describes plants or animals that live or grow independently of people,in natural conditions and with natural characteristics:1 wild adj.wild flowers/grassesa herd of wild horses to become less common and finally stop existing:Dinosaurs died out millions of years ago.Its a custom which is begi
2、nning to die out.2 die out to become less,or to make something become less:Our share of the market has decreased sharply this year.We have decreased our involvement in childrens books.3 decrease v.I or T 1 C or U when you no longer have something or have less of something:Many parents feel a sense o
3、f loss when their children leave home.He suffered a gradual loss of memory.4 loss n.2 S a disadvantage caused by someone leaving an organization:It would be a great loss to the department if you left.3 C or U the death of a person:They never got over the loss of their son.4 C when a business spends
4、more money than it earns:The company announced a pre-tax loss of three million pounds.an area of land kept in its natural state,especially for wild animals to live in to be protected:a nature/game/wildlife reserve5 reserve n.1 to chase and try to catch and kill an animal or bird for food,sport or pr
5、ofit:When lion cubs are young,the mother stays with them while the father hunts for food.Cats like to hunt mice and birds.Elephants used to be hunted for the ivory from their tusks.6 hunt v.I or T 2 to search for something or someone;to try to find something or someone:Ive hunted all over the place,
6、but I cant find that book.They are still hunting for the missing child.Ive hunted high and low(=looked everywhere)for my gloves.They have spent months house-/job-hunting(=looking for a house/a job).1 You are in danger of catching a cold if you dont take any medicine.2 Dont apply for that job:youre i
7、n danger of overreaching yourself.7 in danger(of)8 carpet n.1 U thick woolen or artificial fabric for covering floors or stairs a roll of carpet2 C a piece of carpet used as a floor covering,especially when shaped to fit a room to lay a carpet a bedroom carpet 1 to say or do something as a reaction
8、to something that has been said or done:+speech To every question,he responded I dont know.I asked her what the time was,but she didnt respond.How did she respond to the news?9 respond v.I2 respond to sth.If diseases or patients respond to treatment,the treatment begins to cure them:It remains to be
9、 seen whether the cancer will respond to treatment.10 relief n.（痛苦或忧虑的）减轻或解除；减轻痛苦的事物 Relief was quickly sent to the sufferers from the great fire.救济品很快被送到遭受火灾的灾民手中。in relief 如释重负；松了口气11 burst into laughter突然笑起来；大声笑出来All the classmates burst into laughter when David acted out the episode.当戴维表演完那段插曲时，
10、全班同学都捧腹大笑。kindness and forgiveness shown towards someone whom you have authority over:She appealed to the judge to have mercy on her husband.The prisoners pleaded for mercy.The gunmen showed no mercy,killing innocent men and women.12 mercy n.U1 having no doubt or knowing exactly that something is tr
11、ue,or known to be true,correct,exact or effective:+question word Im not certain how much it will cost.13 certain adj.2 know/say for certain to know or state something without doubt:I dont know for certain if shes coming.to press or be pressed against something with a circular or up and down repeated
12、 movement:She yawned and rubbed her eyes sleepily.He rubbed(at)the stain on his trousers and made it worse.14 rub v.I or T-bb-15 protect v.to keep someone or sth.safe from harm,damage or illness protect sb./sth.from(against)sth.e.g.Kids should be protected from the violence.e.g.The walls were built
13、to protect the country against the attack.protection n.16 mosquito n.a small flying insect that bites people and animals,and sucks their blood:Some types of the anopheles mosquito transmit malaria to humans.mosquito net n.C 蚊帐17 insect n.Ca type of very small,air-breathing animal with six legs,a bod
14、y divided into three parts and usually two pairs of wings,or,more generally,any similar very small animal:Ants,beetles,butterflies and flies are all insects.Ive got some sort of insect bite on my leg.18 contain v.to have sth.inside or have sth.as a part 包含；容纳；容忍e.g.He opened the bag,which contained
15、a wallet,a car key and a mobile phone.e.g.This article contains important information about wildlife protection.container n.容器都有“包含”的意思include指在整体中能明确界定的几个部分。e.g.The health club includes a gym,swimming pool,and locker room.健身俱乐部包括体操房，游泳池和更衣室。词语辨析contain,includecontain侧重包含“内容”或“成分”。I think that veget
16、ables are healthy food because they contain lots of vitamins.我认为蔬菜是不错的食品，因为它们含有大量维生素。19 powerful adj.1 having a lot of strength or force:Shes an extremely powerful runner.The picture quality is bad because the TV signal isnt powerful enough.2 having a very great effect:a powerful drug20 affect v.hav
17、e an effect on 影响；感动；侵袭e.g.Smoking greatly affects health.区别:effect n.have an effect on/upon sb./sth.e.g.Smoking has a great effect on health.21 pay attention to give your attention to 注意1)Please pay attention to this clause in the sentence.请注意看句中的这个从句。2)Please pay attention to the difference betwee
18、n the two words.请注意这两个词之间的区别。3)You must pay attention to your teacher in the class.上课的时候必须专心听老师讲课。22 appreciate vt.鉴赏；感激；意识到1)We appreciate your helping us.我们感谢你们的帮助。2)You cant fully appreciate foreign literature in translation.看翻译作品很难欣赏到外国文学的精髓。3)I appreciate your problem,but I dont think I can help you.我理解你的困难,但却爱莫能助。S subject 主 语P predicate 谓语O object 宾语Attattribute 定语Adv adverbial 状语Com complement 补语Pre predicative 表语C clause 从句Short forms 缩略语Difficult sentences analysisDaisy turned around and found thatshe was being watched by an elephant.S.O.C.P.戴茜转过身去，看到一头大象正望着她。
