Changes in the balance of nature

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1 Changes in the balance of nature
N H C E New Horizon College English III Unit 6 Changes in the balance of nature 新视野

2 What is the balance of nature? What happens if it has changed?
Warming-up What is the balance of nature? Why is it important? What happens if it has changed?

3 Detailed study of the text
N H C E Unit 6 Reading skills Detailed study of the text Exercises

4 Scanning involves searching for details or isolated facts
N H C E Unit 6 Reading Skills Scanning involves searching for details or isolated facts (see Unit 1) . Skimming is to read quickly in order to get the general idea of a passage. Skimming requires the reader to note only information and clues which provide an idea of the central theme or topic of a piece of writing. S K I M N G

5 The following are some questions from Text
N H C E Unit 6 Reading Skills SKIMMING   When you skim, you probably have to move your eyes faster than when you scan although the same steps of reading are involved. Of course, the key step is to decide what information you want to know, and then try to skim for it. The following are some questions from Text B, please try to skim for answers in three minutes.

6 1. Why people say perceptions are relative?
N H C E Unit 6 Reading Skills SKIMMING 1. Why people say perceptions are relative? ______________________________________________ 2. When was the Earth formed? _____________________________ 3. When did the first human beings walk the Earth? ___________________________________ 4.Which section is about men’s control over natural resources? ____________________________________ 5. Which section is about the balance of nature? _____________________________________ Because things in nature, larege or small, new or old, are judged in comparion with other things involved. About five billion years ago. About three million years ago. From paragraph 6 to paragraph 9 From paragraph 10 to paragraph 13

7 e.g. Detailed text stdudy
N H C E Unit 6 Detailed text stdudy 1. …only in accordance with the measures and the comparisons involved. in accordance with: in agreement or harmony with 依照;与……一致 e.g. I very much wanted to continue with my studies but had to get married first in accordance with my parents’ wishes. 我非常想继续我的学业，但我得依照父母的意愿先结婚。 What we do should be in accordance with what we say. 我们应该言行一致。

8 e.g. 2. …from a rotating, circular cloud of dust and gases such as…
N H C E Unit 6 Detailed text study 2. …from a rotating, circular cloud of dust and gases such as… rotate v: turn around a fixed point, or make sth do this （使）旋转、转动 e.g. The satellite slowly rotates as it circles the Earth. 卫星在绕地球旋转的同时缓慢地自转。 Now people know that the earth rotates once every 24 hours. 现在人们知道地球每二十四小时自转一周。

9 e.g. I am not satisfied withi his circular explanaitons.
N H C E Unit 6 Detailed text study circular a-1: shaped like a circle; round 环状的、圆的 e.g. The full moon has a circular shape. 满月呈圆形。 a circular table 圆桌 a circular building 圆形建筑 circular a-2: not direct 迂回的、拐弯抹角的 e.g. I am not satisfied withi his circular explanaitons. 我不满意他拐弯抹角的解释。

10 e.g. Primitive man lived in caves and hunted wild animals.
N H C E Unit 6 Detailed text study 3. …the Earth, were primitive marine animals, and then… primitive a-1: of a very early stage in the development of sth 原始的、早期的 e.g. Primitive man lived in caves and hunted wild animals. 原始人居住在洞穴里，以捕猎为生。 This is the primitive form of the English language. 这就是英语语言早期的形式。 primitive a-2: simple when compared with modern things 简陋的、粗糙的 e.g. The washing facilities in the camp were very primitive. 营地的洗涤设施非常简陋。

11 N H C E Unit 6 Detailed text study 4. In terms of evolution of life on Earth, human beings have just arrived. In terms of : from the viewpoint of; with regard to 鉴于、从…角度来看 e.g. The work is not attractive in terms of cash, but I am getting valuable experience from it. 从挣钱的角度来说，这份工作没有什么吸引力，但我从中获得了宝贵的经验。 In terms of money, the old man is very rich, but not in terms of happiness. 从钱的方面来说，这个老人很富有，但就幸福而言，他却不是这样。

12 N H C E Unit 6 Detailed text study evolution n-1: the development of living things 进化 e.g. In the course of evolution, some birds have lost the power of flight. 在进化过程中，一些鸟丧失了飞行能力。 evolution n-2: the way in which sth gradually changes and develops 演变、发展 e.g. He has made a study on the evolution of philosophical thought of the last century. 他研究了过去一百年哲学思想的发展状况。

13 N H C E Unit 6 Detailed text study renew vt-2: arrange for sth to continue for a futher period of time 延长期限 e.g. You have to renew your library book for another month for this research. 为了这项研究，你必须把你图书馆借的书再续借一个月。

14 e.g. The blindness that the disease causes will be permanent.
N H C E Unit 6 Detailed text study 6. Human activities can cause or accelerate permanent changes in natural system. accelerate v: happen or make sth happen faster or sooner 加速、促进 e.g. Exposure to low-level radiation for a long time may accelerate aging. 长期暴露在低辐射下可能会加速人的老化。 permanent a: lasting or intended to last for a long time or for ever 永远的 e.g. The blindness that the disease causes will be permanent. 这种疾病造成的失明将是永久性的。

15 e.g. The war was becoming an enormous drain on the nation’s resources.
N H C E Unit 6 Detailed text study 5. Yet their numbers create a drain on resources that can’t be renewed. a drain on sth: sth that continually uses a lot of time, money, etc 消耗 e.g. The war was becoming an enormous drain on the nation’s resources. 战争对国家资源的消耗日益严重。 renew vt-1: repalce sth with sth new of the same kind 更新、重新开始 e.g. The trees renew their leaves every spring. 每年春天树木都长出新叶子。

16 e.g. 7. …they retain the ways of life that have remained unchanged…
N H C E Unit 6 Detailed text study 7. …they retain the ways of life that have remained unchanged… retain vt: keep or continue to have something 保留、保存 e.g. Daily facial exercises help to retain the skin’s elasticity. 每天做面部运动有助于保持皮肤弹性。 Flower, when air-dried, will retain their color. 花朵风干后能保持原有的颜色。

17 e.g. They were charged with abusing their power to keep prices.
N H C E Unit 6 Detailed text study 8. As an outcome of their hunger for empires, the Earth was abused. abuse vt-1: make bad or wrong use of something 滥用 e.g. They were charged with abusing their power to keep prices. 他们被控滥用职权抬高物价。 He abused his inheritance. 他滥用他的遗产。 abuse vt-2: treat someone badly 虐待 e.g. The old lady runs a hostel for women who have been abused by their husbands. 这位拉太太开了一家招待所，收留受丈夫虐待的妇女。

18 N H C E Unit 6 Detailed text study 9. Now that they are no longer ignorant of the causes of sickeness of our planet… be ignorant of: know little or nothing about 一无所知 e.g. The doctor thought that girl was ignorant of the fact that she had cancer, but she wasn’t. 大夫以为这个女孩对她得了癌症的事一无所知，但事实并非如此。 By then , he was ignorant of the importance of eduction. 那时，他还不知道教育的重要性。

19 N H C E Unit 6 Exercise Fill in the blanks with the words given below. Change the form where necessary. rotate flourish retain manual outcome permanent abuse duration accelerate ingnorant likewise protective exceed shortage 1. Parents undoubtedly worry even more than teachers about the horrible________ of their children not doing schoolwork. 2. Most police departments keep a(n)___________ record of al violent crimes commited in their areas. outcome permanent

20 __________expectations.
N H C E Unit 6 Exercise 3. The car has been General Motor’s visible success story, with sales far __________expectations. 4. And because the bank lends on a large scale, its failure are ___________ on a large scale. 5. It is the development strategy of the company to ____________ to overseas expansion so as to take a slice in the world market. 6. How to _________ the technical talents in the company remains an important issue for the management of the company. 7. Mary was totally ___________of what had happened to her boyfriend. exceeding likewise accelerate retain ignorant

21 N H C E Unit 6 Exercise 8. They acknowledged that there was a severe _________ of nurses throughout the country and they came to a conclusion that a training program should be organized. 9. According to the event, the _________ of this state may last from just a few months to many years. 10. Some countries have taken more __________measures to save life and property damage from earthquake. shortage duration protective

22 N H C E Unit 6