Unit 5 Understanding ideas Macquarie Island 知识点（ppt课件）-2023新外研版（2019）《高中英语》选择性必修第二册.pptx

1、Macquarie Island:from Chaos to ConservationBook5 Unit 5 A Delicate World Understanding Ideas Book5 Unit 5 A Delicate World Understanding Ideas I am standing _ Macquarie Island,_ the South-west Pacific Ocean,_ (中途）between Australia and Antarctica.Strong winds and stormy seas have helped _（塑造）its long

2、,thin shape.The green grass and bare rock of its landscape _（对比鲜明）,_ it a wild and natural beauty.oninhalfwaysculptcontrast dramaticallygiving_ visitor would think _ surprising _ the island is a UNESCO World Heritage Site._ they _(未能做到)imagine _ its _(本土动物,including royal penguins,king penguins,and

3、elephant seals,existed _ their natural habitat for thousands of years.Noitthatin perfect harmony withfail tohownative inhabitantsNor wouldNor【nor的用法】nor为否定词，用在一个否定句之后来引出另一个相关的否定句。NorNor would they fail to imagine how its native inhabitants,would they fail to imagine how its native inhabitants,includ

4、ing royal penguins,king penguins,and elephant including royal penguins,king penguins,and elephant seals,existed in perfect harmony with their natural seals,existed in perfect harmony with their natural habitathabitatfor thousands of years.for thousands of years.1句意：他们也不难想象出，数千年来，包括帝企鹅、王企鹅和象海豹在内的当地动物

5、是如何与其自然栖息地完美地和谐共存的。nor的倒装结构：nor+助动词/情态动词+主语+谓语动词+其他成分例：1.她没有打字经验，那种技术也引不起她的兴趣。_ _.2.你不能撤约，任何人都不能。_.3.他没再去过，也没写信致歉。_.She has no experience in typing,nor does the skill interest herYou cant cancel the contract，nor can anybody elseHe never went again,nor did he write to apologize But the islands more r

6、ecent history tells a different _(n.叙述，描述).Its a tragic _(n.故事)that began in 1810 _ humans arrived on the island.In their ships they _(adv.不知情地)brought rats and mice.These small animals quickly _(占领)the island,_(eat)the birds eggs and _(attack)any baby birds.Cats were brought to the island to contro

7、l the rats and mice.Unfortunately,the cats _(adv.后来，随后)_(对产生食欲)the birds,too.story story when took overeating attacking unknowingly But the islands more recent history tells a different story(叙述，描述).Its a tragic story(故事)that began in 1810 when humans arrived on the island.In their ships they unknow

8、ingly brought rats and mice.These small animals quickly took over the island,eating the birds eggs and attacking any baby birds.Cats were brought to the island to control the rats and mice.Unfortunately,the cats _ (adv.后来，随后)_(对产生食欲)the birds,too.subsequently developed an appetite for develop a tast

9、e for /an interest in develop a close friendship with /the habit of Meanwhile,rabbits _(introduce)to the island as a _(来源)of food for humans._(自由，不受拘束)on the island,they did _ rabbits do best they _(翻倍)rapidly and began _(eat)the native vegetation and _(dig)holes,_ caused soil erosion.The _(explode)

10、rabbit population provided _(plenty)food for the cats,_(mean)that _ number of cats also increased.This _(相应地)led to more cats _(hunt)the birds.The end result was _ parakeets,once large in number and native to the island,_(灭绝)in 1891.were introducedsourceLoosewhatmultipliedeatingdiggingwhichexploding

11、plentifulmeaningthe Meanwhile,rabbits were introduced to the island as a source of food for humans.Loose on the island,they did what rabbits do best they multiplied rapidly and began eating the native vegetation and digging holes,which caused soil erosion.The exploding rabbit population provided ple

12、ntiful food for the cats,meaning that the number of cats also increased.This _(相应地)led to more cats _(hunt)the birds.The end result was _ parakeets,once large in number and native to the island,_(灭绝)in 1891.in turnthatdied out huntingmultiply v.（使）增加；（使）倍增；（使）繁殖；multiplies-multiplying-multiplied Loo

13、se on the island,they did what rabbits do best they Loose on the island,they did what rabbits do best they multipliedmultiplied rapidly and began eating the native vegetation rapidly and began eating the native vegetation and digging holes,whichand digging holes,whichcaused soil erosion.caused soil

14、erosion.3句意：由于在岛上放任其生存，兔子做了自己最擅长的事飞快地繁殖，它们开始吃当地植被并挖洞，造成了土壤侵蚀。例：1.Their problems _ since last year.2.在实验室里繁殖这些细菌是可能的。_.have multipliedIt is possible to multiply these bacteria in the laboratoryThis This in turnin turn led to more cats hunting the birds.The end led to more cats hunting the birds.The e

15、nd result was that parakeets,once large in number and native result was that parakeets,once large in number and native to the island,to the island,died died out out in in 1891.1891.4in turn 轮流，依次，反过来句意：这反过来就有更多猫捕食鸟类。最终结果是，曾经数量众多的当地物种长尾小鹦鹉在1891年灭绝。例1：女孩子们饭后轮流擦桌子。The girls took it _ to wipe down the t

16、ables after meals.in turn【拓展】take turns to do sth/in(doing)sth.轮流做某事Its ones turn to do sth.轮到某人做某事take ones turn 依次，轮到某人by turns 轮流，依次例：1.Its your turn _(recite)the passage.2.We take turns to make/in making dinner.=We make dinner by _(turn).to reciteturns*in turn 表示“轮流；反过来”，而in return(for)表示“作为（对）的

17、回报”。by turns和take turns中的turn用复数形式。die out 灭绝；消失例：Laws should be passed to protect pandas.Otherwise,they are certain to _.die out【拓展】die相关的短语 dieof因而死 dieofillness(heart trouble,cancer,a fever,hunger,etc)diefrom由于而死 diefromanearthquake(atraffic accident,wound,lackoffood,overwork,carelessness,drinkin

18、g,etc)dieaway指声音、光等渐渐消失；风等渐渐减弱、停下来；也可指人慢慢死去 Even after Macquarie Island became an official nature reserve in the 1970s,the rabbits remained _(失去控制).Experts felt _ necessary to come up with a plan _(remove)all the rabbits _ the island.With this goal_(mind),a virus was _(释放)onto the island.But althoug

19、h the virus caused the rabbit population to _(减少，降低)_ 130,000 _ around 10,000,it also meant less food for the cats.out of controlittoremoveoninmindreleaseddecreasefromtodecrease v.（使）减少；（使）变小 n.减少；降低 But although the virus caused the rabbit population to But although the virus caused the rabbit popu

20、lation to decreasedecrease from 130,000 to around 10,000,it also meant less from 130,000 to around 10,000,it also meant less food for the cats.food for the cats.5句意：然而，虽然病毒使得兔子的数量从130,000降到约100,000只，但这也意味着猫的食物变少了。例：人们应该减少脂肪的摄入量。_.People should decrease the amount of fat they eat【拓展】decrease to 减少到 d

21、ecrese in sth（在某方面）降低，减少 decrease by 减少了 on the decrease 在减少例：1.A local newspaper remarks that crime is _ the decrease.2.The traffic accident in the city decreased _ 30%last year.3.The population of China has increased _ about 1.4 billion.onbytoThe cats _(结果)turned their attention and their stomachs

22、 _(回到)the native birds,_(kill)_（多达）60,000 each year.In the 1980s,traps and dogs were used to catch the cats.The last Macquarie Island cat was caught in 2000.in consequenceback tokillingup to But _ the saying goes,“While the cats away,the mice will play.”With the _(depart)of the cats _ the island,the

23、 mouse and rat population started to increase.And remember those 10,000 _ rabbits?It _ that they developed _(immune)to the virus,and their numbers exploded once again.Then,in 2006,the _(rabbit dig)caused some land to collapse,and _(kill)_ substantial number of penguins.This incident made_ clear_ the

24、 rat,mouse and rabbit problem needed _(solve)once and for all(_).asdeparturefromor soturned outan immunityrabbits diggingkilledaitthatsolving彻底地，一次了结地彻底地，一次了结地 So,I am here on Macquarie Island to participate _ the programme to_(解决)this _(正是的，恰好的，同一的)problem.The first step involved poison _(drop)from

25、 helicopters.The next step is _(remove)the last _ (残存的入侵的)species,and thats _ I come in with my dogs.They have been trained to find _(剩下的每一个),without harming the native animals.This _(干预，介入)is a long,_(迟来的结局)a sad story,but we humans owe _ to the island _(give)it a happy ending.intackleverybeing dro

26、ppedto removeremaining invadingwhereevery last/single oneinterventionmuch-delayed ending toitto giveowe it to sb to do sth.应该为某人做.we owe it to the heroes to build a memorial.Postscript :In 2014,Macquarie Island was declared _(没有害兽、虫、鸟的）and the islands ecology is finally _（走上复苏之路）.pest-freeon the road to recovery