Unit2 Saving the earth Topic3 SectionC 课文讲解及知识点仁爱版英语九年级上册

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名称 Unit2 Saving the earth Topic3 SectionC 课文讲解及知识点仁爱版英语九年级上册
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更新时间 2024-07-24 12:46:01

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Unit 2 Topic 3 Section C
课文讲解及知识点
一 . 课文翻译 :
In many countries , people produce power from coal , but it is very dirty and causes acid rain .
在许多国家,人们利用煤炭发电,但这非常肮脏并会导致酸雨。
Some countries use nuclear energy to produce power .
一些国家利用核能发电。
However , nuclear power can be very dangerous .
然而,核能发电可能非常危险。
To solve the energy problem , people all over the world are looking for new ways to produce power.
为了解决能源问题,世界各地的人们都在探索利用可再生能源发电。
China is one of the first countries in the world to use biogas technology .
中国是世界上最早使用沼气技术的国家之一。
Farmers recycle straw , grass and animal waste to make biogas .
农民们利用秸秆、草和动物粪便制造沼气。
This renewable energy is used in people ' s everyday lives .
这种可再生能源已应用于人们的日常生活中。
Its key disadvantage is that the process requires a long time ( up to 30 days ) and the cost is high .
其主要缺点是生产过程需要很长时间(长达30天),且成本高昂。
Electric vehicles were developed in the 1990s.
电动汽车于20世纪90年代研制成功。
On April 11,2010, a new kind of electric vehicle named " Yezi " was shown in the 2010 Shanghai World Expo .
2010年4月11日,在2010年上海世博会上展出了一种名为“叶子”的新型电动汽车。
It produces electricity from the sun , the wind and CO2.
它能利用太阳能、风能和二氧化碳发电。
It can not only protect the environment but also save energy .
它不仅能保护环境,还能节约能源。
It ' s too small to hold many people , but larger models will be developed in the near future .
它太小,不能容纳很多人,但未来不久将会研发出更大的型号。
In China , the best - known maglev train is the German - built one in Shanghai .
在中国,最著名的磁悬浮列车是上海的那条德国制造的列车。
It takes people just 7 minutes to go to the airport 30 km away .
它只需7分钟就能将人们带到30公里外的机场。
The train can reach a top speed of 431 km per hour .
列车最高时速可达431公里。
It is quiet and quick .
它安静且快速。
There is no wheel noise , because there are no wheels .
因为没有车轮,所以没有车轮噪音。
Maglev trains are very energy - efficient and do not pollute the air .
磁悬浮列车非常节能且不会污染空气。
However , maglev guide paths are much more expensive than traditional steel railways .
然而,磁悬浮轨道比传统钢轨要昂贵得多。
二 . 课文讲解及知识点:
In many countries , people produce power from coal , but it is very dirty and causes acid rain.
People produce power from coal.
主语:People
谓语:produce
宾语:power
状语:from coal(说明电力的来源)
并列句:but it is very dirty and causes acid rain.
主语:it(代指coal)
谓语1:is
表语1:very dirty
谓语2:causes
宾语2:acid rain
连接词:but(表示转折)
知识点:
produce power from coal:从煤炭中发电
cause acid rain:导致酸雨
并列句结构:使用but连接两个并列的分句
短语及拓展:
dirty energy:脏能源(指产生污染或有害副产品的能源)
renewable energy:可再生能源(如太阳能、风能等)
clean energy:清洁能源(指不产生或产生很少污染物的能源)
Some countries use nuclear energy to produce power . However , nuclear power can be very dangerous.
句1:Some countries use nuclear energy to produce power.
主语:Some countries
谓语:use
宾语:nuclear energy
目的状语:to produce power(说明使用核能的目的)
并列句:However, nuclear power can be very dangerous.
主语:nuclear power
谓语:can be
表语:very dangerous
连接词:However(表示转折)
知识点:
use ... to do sth.:使用...来做某事
nuclear energy:核能
nuclear power:核能发电
短语及拓展:
alternative energy:替代能源
fossil fuels:化石燃料(如煤、石油、天然气)
nuclear accident:核事故
To solve the energy problem , people all over the world are looking for new ways to produce power..
目的状语:To solve the energy problem
主语:people all over the world
谓语:are looking for
宾语:new ways
目的状语:to produce power
知识点:
solve the problem:解决问题
explore renewable energy:探索可再生能源
all over the world:全世界
短语及拓展:
sustainable development:可持续发展
green energy:绿色能源
energy conservation:节能
China is one of the first countries in the world to use biogas technology.
主语:China
谓语:is
表语:one of the first countries
修饰语:in the world(限定范围)
后置定语:to use biogas technology
知识点:
one of + 复数名词:表示“...之一”
in the world:在世界上
to use biogas technology:不定式短语作后置定语,表示“使用沼气技术的”
短语及拓展:
renewable energy:可再生能源
alternative energy sources:替代能源
environmental technology:环保技术
Farmers recycle straw, grass and animal waste to make biogas.
主语:Farmers
谓语:recycle
宾语:straw, grass and animal waste(并列宾语)
目的状语:to make biogas(说明回收的目的)
知识点:
recycle sth. to do sth.:回收某物以做某事
straw, grass and animal waste:秸秆、草和动物粪便
make biogas:生产沼气
短语及拓展:
waste management:废物管理
organic waste:有机废物
sustainable agriculture:可持续农业
This renewable energy is used in people's everyday lives.
主语:This renewable energy
谓语:is used
状语:in people's everyday lives
知识点:
renewable energy:可再生能源
be used in...:被用于...
everyday lives:日常生活
短语及拓展:
energy consumption:能源消耗
energy efficiency:能源效率
sustainable energy use:可持续能源利用
Its key disadvantage is that the process requires a long time (up to 30 days) and the cost is high.
主语:Its key disadvantage
谓语:is
表语从句:that the process requires a long time (up to 30 days) and the cost is high
并列句:the process requires a long time 和 the cost is high
插入语:up to 30 days
知识点:
key disadvantage:主要缺点
require a long time:需要很长时间
up to:多达,直到
the cost is high:成本高
短语及拓展:
cost-effective:成本效益高的
time-consuming:耗时的
economic feasibility:经济可行性
Electric vehicles were developed in the 1990s.
主语:Electric vehicles
谓语:were developed
时间状语:in the 1990s
知识点:
passive voice(被动语态):表示“电动汽车被开发”。
时间表达法:“in the 1990s”表示“在20世纪90年代”。
短语及拓展:
renewable energy vehicles:可再生能源汽车
eco-friendly vehicles:环保汽车
technological advancement:技术进步
On April 11, 2010, a new kind of electric vehicle named "Yezi" was shown in the 2010 Shanghai World Expo.
时间状语:On April 11, 2010
主语:a new kind of electric vehicle
定语:named "Yezi"
谓语:was shown
地点状语:in the 2010 Shanghai World Expo
知识点:
过去时态:表示过去某时发生的动作或状态。
named "Yezi":过去分词短语作定语,表示“被命名为‘叶子’的”。
World Expo:世博会
短语及拓展:
green transportation:绿色交通
international exhibition:国际展览
technological showcase:技术展示
It produces electricity from the sun, the wind and CO2.
主语:It
谓语:produces
宾语:electricity
状语:from the sun, the wind and CO2
知识点:
并列连词:and 连接三个并列的名词短语作为电力的来源。
可再生能源的应用。
短语及拓展:
renewable energy sources:可再生能源
solar power:太阳能
wind power:风能
carbon capture and utilization:碳捕获与利用
It can not only protect the environment but also save energy.
主语:It
谓语:can not only protect, but also save
并列宾语从句:the environment , energy
知识点:
not only...but also...:不仅...而且...
环保与节能的双重效益。
短语及拓展:
environmental protection:环境保护
energy conservation:节能
sustainable development:可持续发展
It's too small to hold many people, but larger models will be developed in the near future.
句1:It's too small to hold many people
主语:It
谓语:is
表语:too small
结果状语:to hold many people
并列句:but larger models will be developed in the near future
主语:larger models
谓语:will be developed
时间状语:in the near future
知识点:
too...to...:太...而不能...
将来时态:will be developed 表示“将会被开发”。
对比结构:but 表示转折。
短语及拓展:
capacity limitation:容量限制
future development:未来发展
technological innovation:技术创新
In China , the best - known maglev train is the German - built one in Shanghai .
主语:the best - known maglev train
谓语:is
表语:the German - built one
状语:In China(介词短语作地点状语)
知识点:
best - known:最高级形容词,表示“最著名的”
German - built:过去分词作定语,表示“德国制造的”
one:代词,指代同类中的一个,这里指“磁悬浮列车”
短语及拓展:
best - known:类似短语有well - known(广为人知的)
in Shanghai:地点介词短语,表示在某地,可以替换为in other cities(在其他城市)
It takes people just 7 minutes to go to the airport 30 km away .
主语:It
谓语:takes
宾语:people
宾语补足语:just 7 minutes
不定式短语作真正的主语:to go to the airport 30 km away
状语:just(副词作程度状语)
知识点:
It takes sb. some time to do sth.:固定句型,表示“某人花费多少时间做某事”
30 km away:副词短语作后置定语,修饰the airport,表示“距离30公里远”
短语及拓展:
just 7 minutes:时间短语,可以替换为不同的时间长度,如just 5 hours(仅5小时)
30 km away:距离短语,可以替换为其他距离,如10 miles away(10英里远)
The train can reach a top speed of 431 km per hour .
主语:The train
谓语:can reach
宾语:a top speed
介词短语作定语:of 431 km per hour
知识点:
can reach:情态动词+动词原形,表示“能够达到”
a top speed:表示“最高速度”
per hour:表示“每小时”
短语及拓展:
a top speed:类似短语有a maximum speed(最大速度),a record speed(记录速度)
per hour:时间单位短语,可以替换为其他时间单位,如per day(每天),per week(每周)
It is quiet and quick .
主语:It
谓语:is
表语:quiet and quick(并列形容词作表语)
知识点:
quiet and quick:并列形容词,表示“安静且快速”
短语及拓展:
quiet and quick:类似短语有easy and convenient(简单且方便),safe and reliable(安全且可靠)
There is no wheel noise , because there are no wheels .
第一分句:
主语:There
谓语:is
表语:no wheel noise
第二分句(并列句):
原因状语从句:because there are no wheels
主语:there
谓语:are
表语:no wheels
知识点:
There is/are...:There be句型,表示“存在”
because:连词,表示原因
no+名词:表示否定,没有...
短语及拓展:
no wheel noise:类似短语有no traffic noise(没有交通噪音),no background noise(没有背景噪音)
because of:介词短语,表示原因,可以替换because引导的原因状语从句,如Because of the rain, we stayed home.(因为下雨,我们待在家里。)
Maglev trains are very energy - efficient and do not pollute the air .
主语:Maglev trains
谓语:are/ do not pollute(并列谓语)
表语: very energy - efficient
宾语:the air(并列宾语)
知识点:
energy - efficient:复合形容词,表示“节能的”
do not pollute:否定句,表示“不污染”
短语及拓展:
energy - efficient:类似短语有environmentally friendly(环保的),cost - effective(成本效益高的)
pollute the air:类似短语有pollute the water(污染水源),pollute the soil(污染土壤)
However , maglev guide paths are much more expensive than traditional steel railways .
状语:However(副词作转折状语)
主语:maglev guide paths
谓语:are
表语:much more expensive
状语:than traditional steel railways(介词短语作比较状语)
知识点:
much more expensive:比较级形容词,表示“更昂贵得多”
than:介词,表示比较
短语及拓展:
much more expensive:类似短语有much faster(快得多),much better(好得多)
traditional steel railways:类似短语有modern high-speed trains(现代高铁),electric subways(电动地铁)