Unit 1 Nature in the Balance Reading （ppt课件）-2023新牛津译林版（2020）《高中英语》必修第三册.pptx

1、By the end of this class,we will be able to 1.Review the meaning of these key words and key phrases2.Master the usage of these key wordsRead these words aloud and circle the words that you dont undersrtandThe Amazon rainforest：a natural treasureWelcome to the jungle,a huge sea of green alive with th

2、e sounds of animals.This is the Amazon rainforest.As the largest rainforest in the world,it plays a significant role in maintaining the fine balance of the Earths ecosystem.a sea of 大片的，成片的大片的，成片的 see a sea of smiling facesbe alive with 充满充满play a role/part in doing sth在在.中起作用中起作用 Welcome to the jun

3、gle,a huge sea of green alive_ the sounds of animals.This is the Amazon rainforest.As _ largest rainforest in the world,it plays a significant role _ maintaining the fine balance of the Earths ecosystem.The Amazon rainforest _(cross)into eight_(country),including Brazil and Peru,and one overseas reg

4、ion of France,all on the South American continent._ an area of around 6 million square kilometres,the Amazon rainforest is more than half the size of China.with theincrossescountriesWithThe Amazon rainforest crosses into eight countries,including Brazil and Peru,and one overseas region of France,all

5、 on the South American continent.With an area of around 6 million square kilometres,the Amazon rainforest is more than half the size of China.cross into 横跨横跨with an area of面积为面积为.The Amazon River,from which the rainforest gets its name,is close to 6,400 kilometres in lengthroughly 100 kilometres lon

6、ger than the Yangtze River.On its journey from the mountains to the ocean,the river supports many different ecosystems.They give this area the richest biodiversity on the Earth:one in ten known species in the world can be found here.in length 在长度上在长度上from.to.从从.到到on the earth 在地球上在地球上on earth究竟，到底究竟

7、，到底What on earth do you mean?one in ten十分之一十分之一分数表达：分数表达：Of the 390,000 plant species known to us,more than 40,000 can be found in the Amazon.This tall and ancient brazil nut tree produces nuts that we can eat;these water lilies are big enough to lie down on.The forests different levels support an u

8、nbelievable variety of wildlife.At the bottom,there is a system of roots beneath the ground.be known to 为.所知be known for 因.而出名=be famous forShe is known to everyone in the college.He is known for his beauty.be enough to do sth 足够做某事足够做某事He is old enough to go to school.lie down 躺下躺下a variety of 各种各样

9、的各种各样的various ofall kinds/sorts ofAbove that is the mass of leaf litter on the dark forest floor.The next level is made up of shorter plants with large leaves.Then there are the towering ancient hardwoods,and finally the tops of the tallest trees many metres above the ground.Each level of the forest

10、 forms its own little world,home to different kinds of living things.the mass of 大量的大量的leaf litter落叶层落叶层be made up of 由由.组成组成the tops of.在在.的顶部的顶部be home to.的家园的家园Read Paragraph 3 and complete the mind m a p a b o u t d i f f e r e n t l e v e l s o f t h e rainforest.supporting various wildlifebein

11、g home to diffferent kinds of living thingsa system of roots（根系）（根系）the mass of leaf litter（落叶层）（落叶层）shorter plants with large leavestowering ancient hardwoods（阔叶树）（阔叶树）the tops（树冠）（树冠）of the tallest treesPargraph 3 More than 1,300 species of birds and over 400 species of mammals hide among the jung

12、les plant life.This jaguar is one example.It has a yellowish-brown coat with black spots.While a significant number of jaguars survive here,they are only one element of this forests food chain.a number of.大量的大量的+名词的复数名词的复数the number of.的数量的数量+名词的复数名词的复数more than超过超过less than 少于少于They feed on at leas

13、t 87 species,including frogs.These frogs,in turn,feed on insects which eat leaves and fruit.When a jaguar dies,a tiny army of microorganisms helps break down its body and return the nutrients to the earth.feed on以以.为食为食at least 至少至少In turn 相应地，转而相应地，转而In return作为回报作为回报tiny(adj)极小的，微小的极小的，微小的break do

14、wn使分解，使变化使分解，使变化 return to 回到，返回，表示回到哪里回到，返回，表示回到哪里 return back返回，归还，报答，回报，返回，归还，报答，回报，常用于归还东西常用于归还东西If I could return the time,I would put you first in my life.The Amazon rainforest breathes life into the planet by fixing carbon and producing over 20 per cent of all the Earths oxygen.Thus,it is oft

15、en known as the“lungs of the planet”.Moreover,the Amazon rainforest is a treasure house of species that can be used for food or medicine.Yet there is one major danger to these irreplaceable plants and animals:us.breathe life into 给给.带来起色，带来起色，注入活力注入活力planet(n)行星，地球行星，地球be known as 作为作为.而出名而出名+角色，身份角

16、色，身份be known/famous for以以.而闻名而闻名be used for sth/doing sth被用来做某事被用来做某事used to do sth表示过去的动作和状态表示过去的动作和状态would do sth表示过去的动作表示过去的动作be used to doing sth习惯于习惯于Over the past 50 years,about 17 per cent of the rainforest has disappeared due to human activities such as agriculture and cattle farming.As the

17、impact of human activities continues to grow and the list of species in danger of extinction becomes longer,we are left with a question:can we afford to damage the“lungs of the planet”?due to=because of/owing to由于由于such as 例如例如impact=influence影响影响(n/v)have an effect/impact/influence on 对对.有影响有影响cont

18、inue to do sth继续做某事继续做某事be in(great)danger处于危险之中处于危险之中In danger of 处于处于.危险之中危险之中extinct(adj)灭绝的，消亡的灭绝的，消亡的extinction(n)灭绝灭绝afford to do sth 支付得起去做某事支付得起去做某事1.for+时间段；I have learned English for ten years 2常见的副词：lately；recently,just，up to now,till now,so far,these days，in the past few yearsmonthsweeksdays 3注意：for+时间段；since+时间点 They have lived in Beijing for five years They have lived in Beijing since l995 4 第几次做某事，后面跟现在完成时This is the first time that I have watched stars through a telescope