资源简介

(共32张PPT)
　UNIT 6　
Nature in words
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Developing ideas
1. Students could learn some words and phrases.
2. Students could get the main idea of this passage.
3. Students could write sentences about this topic.
Learning Aims:
寂静的春天
Silent Spring
What is your understanding of this title？
Share with others
DDT
Brainstorming:Before learning this passage, what ideas come to your mind
1. birds and flowers
2. spring
3. creature and hope
Look at them and answer the questions!
Facts about DDT:
DDT was first produced in 1874 and was later used as pesticide.
It stays in the environment.
It is highly poisonous to living organism, including humans.
Now banned in many countries, it is still used in some for malaria control.
How does DDT reach the human body in the food chain
is sprayed
onto plants
leaks through the soil and into rivers
is absorbed by the plants
is consumed by animals
contaminates fish
What harm does DDT cause
DDT is highly dangerous to living organism.
Look at them and answer the questions!
Rachel Carson
writer, scientist, and ecologist
Look at them and answer the questions!
d. … flattened my nose against the cold window to watch the falling snow…
In sentence (d), does “to watch” indicate purpose or result
What is the function of “falling”
Purpose：An attributive used to describe the snow.
Grammars---非谓语动词做补语
1.非谓语动词——不定式在句子中充当补语。
You are not allowed to smoke here.你不（被）允许在这里吸烟。
2.非谓语动词——现在分词在句子中充当补语
例如：I heard her singing when I passed by.当我经过时，我听见她正在唱歌。
He had his son standing outside all night.他让他的儿子一整晚都站在外面。
3.非谓语动词——过去分词在句子中充当补语
例如：I want to see the plan carried out我想看这个计划（被）实施。
I'll get my bike repaired tomorrow.明天我将去修我的自行车。/我将使我的自行车明天被修。
1 There was a strange stillness. The birds,
for example – where had they gone
Many people spoke of them, puzzled and
disturbed. The feeding stations in the
backyards were deserted. The few birds seen
anywhere were moribund; they trembled
violently and could not fly. It was a spring
without voices. On the mornings that had
once throbbed with the dawn chorus of
robins, catbirds, doves, jays, wrens, and
scores of other bird voices there was now no
sound; only silence lay over the fields and
woods and marsh.
Because most birds were gone.
1. Why did many people get puzzled and disturbed
Take notes quickly！
重点词汇
backyards 后院 ;
moribund 行将灭亡的 ; 即将倒闭的 ;
trembled 颤抖，哆嗦，抖动
throbbed 抽动，抽痛 ; 跳动
dawn chorus 破晓时的鸟鸣声
wrens 鹪鹩 ;
scores of 许多 ; 大量 ; 几十个
lay over 延缓期
2 Rachel Carson was a scientist by profession,
but these lines from the opening chapter of
her 1962 book Silent Spring, “A Fable for
Tomorrow”, show her talent as a writer. By
imagining a world without birds, she aimed
to alert not only the scientific community
but also the general public to the damaging
effects of human activity on natural
ecosystems – in particular, to the harmful
use of pesticides, such as DDT. She believed
that the chemical industry was knowingly
causing harm to plants, animals and even
humans, and wished to see pesticides used
in a more responsible, limited and carefully monitored way.
Basic information of this book
What is the main idea of this part
Take notes quickly！
重点词汇
by profession 在职业上；就职业来说
Silent Spring 寂静的春天 ; 沉默的春天
scientific community 科学界 ; 科学共同体 ;
general public 普通百姓 ; 公众
in particular 尤其 ; 特别
such as 例如
chemical industry 化学工业
responsible 有责任的 ; 负责的
Content of this book
3 Carson urged people to make themselves aware of the facts and do something about the situation. Silent Spring contains a lot of scientific research and case studies. The book details the gypsy moth eradication programme, which killed birds, in additionto gypsy moths. Another case study was the fire-ant programme that killed cows, but not fire ants. The book also gives dozens of other examples of eradication programmes
that did nothing to reduce the problems they were originally designed to solve. The 50 or so pages at the end of the book list Carson’s sources, showing how thorough and precise she was as a scientist.
What is the main idea of this part
Take notes quickly！
重点词汇
be aware of 意识到
Silent Spring 寂静的春天 ;
scientific research 科学研究
gypsy moth 舞毒蛾
case study 个案研究 ; 专题研究 ;
dozens of 几十 ;
at the end of 在...的结尾，在...末端
book list 图书列表 ; 书单
Influence of this book
What is the main idea of this part
4 Carson’s message was very alarming,
causing a great increase in environmental
awareness. Its impact was immediate and far
reaching: the use of DDT was banned and
the Environmental Protection Agency (EPA)
was established in the US. Silent Spring was
therefore regarded as a milestone in the
launch of the green movement in the Western
world. It also earned Carson a posthumous
Presidential Medal of Freedom and put her face on the 17-cent US stamp.
Take notes quickly！
重点词汇
alarming 使人惊恐的 ; 令人惊慌的
increase in 增加 ; 在…方面增长
DDT【化】二氯二苯三氯乙烷 ;
EPA 美国环保署 ;
Silent Spring 寂静的春天 ;
milestone 重要事件 ; 里程碑
posthumous 死后发生的
Presidential Medal of Freedom
总统自由勋章
Comments on this book
What is the main idea of this part
5 Silent Spring was not, however, received positively by everyone. Though Carson’s research was strong and was supported by most scientists who reviewed her work, the book quickly became a target for critics in the pesticide industry. They said that Carson did not understand the science behind her arguments because she was a marine biologist rather than a chemist. Some also said that her work was more emotional than scientific. These were attempts to damage Carson’s reputation and stop her work from influencing public policy, but she remained determined to stand by her research. Carson appeared in public and on television to defend her claims – and today, more than 50 years after it was published, the voice of Silent Spring is still ringing loud and clear.
Take notes quickly！
重点词汇
Silent Spring 寂静的春天 ;
marine biologist 海洋生物学家
rather than 而不是 ; 而不
public policy 公共政策
stand by 袖手旁观 ;
in public 公开地 ; 公然地 ; 当众，
loud and clear 清晰明了 ;
Features of the writing
What is the main idea of this part
6 Personally, I enjoy Carson’s book. She made a crucial but potentially difficult to-understand subject interesting and accessible to millions of people. This is not so much because of the quality of her arguments, strong though they are, but because of the beauty and elegance of her writing. Her book not only changed the world; half a century later it remains a book that deserves to be reread today, so that we can once again feel ourselves warm to the fire of its passionate message. For unless we do listen to Rachel Carson’s warning, one day we may wake up to the strange and quiet horror of another silent spring.
Take notes quickly！
重点词汇
millions of people 数百万人
half a century 半个世纪 ; 半世纪
so that 因此 ; 以便
once again 再一次，
warm to 温暖到 ;
listen to 听
wake up to 觉察到 ; 意识到
silent spring 寂静的春天
Book
Review
Para. 2
Para. 3
Para. 4
Para. 5-6
Para. 6
The basic information of this topic
Content of this book
Influence of this book
Comments on this book
Features of the writing
1．What can we learn about Rachel Carson
A．She was born in 1912.
B．She was a writer.
C．She thought pesticides were harmful.
D．She used too many pesticides.
2.Who supported Carson's research strongly
A．Most writers.
B．Most scientists.
C．Most officials.
Why was silent spring so successful
realized the general public to the dangers of DDT.
improve people‘s environmental awareness.
Why did some people challenge Carson’s findings
your opinions
... ...
personal interests
negative impacts
Try to think about others
Question
Talk with others.
Write your ideas.
1.
2.
3.
Thank you!

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