【课文讲解】

背诵：Pollution is the price we pay for an overpopulated, over industrialized planet.
I was blamed for being late.

L47-03  end  12’03”

L47-04  begin  12’22”

Losing health is the price he paid for his hard work./ (working hard/ over working )
come to ==get to
并列平行结构
There are some good ways to study English well.
listen, speak, read and write.
There are four good ways to study English: listening, speaking, reading and writering.
reuse it   recyde it
背熟：We keep trying all four methods, but he sheer volume of rubbish we produce worldwide threatens to overwhelm us.

volume == amount
threaten to do
Eg: The coming earthquake threatens the village.
Dark clouds threaten a heavy storm. 乌去预示着有一场风暴。
The sun promises a good day.
It is possible...

背熟：The need to produce ever-increasing quantities of cheap food leads to a different kind of pollution.
leads to

L47-04  end  12’22”
Lesson47A  end  48:29

Lesson47B  begin  54:49
L47-05 begin  49-02

背熟：The price we pay for cheap food may be already too high
The price we pay is too high.
abandon 强调被迫放弃
organically-grown vegetable: 绿色蔬菜
every time: whenever
innocent (of) adj. 清白的，无辜的，无知的

Paragraph 3 (l.15)
noise

L47-05 end  12’19”

L47-06  begin  12’49”

Paragraph 3 (l.15)
insidious 暗中为害的，阴险的

Burglar alarms going off at any time of the day or night serve only to annoy passers-by and actually ( to ) assist burglars to burgle.

背熟：Car alarms constantly scream at us in the street and are a source of profound irritation.
Eg: Her husband earns a lot of money every mounth and he is a source of income. 他的丈夫每月能赚很多钱，这是他的一棵摇钱树。

背熟：The survey revealed a large number of sources of noise that we really dislike.

名词结构 （平行结构）
lawn mower 割草机
container trucks: 集装箱卡车
sources of noise

背熟：New technology has also made its own contribution to noise.
make contribution to 作出...... 的贡献

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