大学英语 Unit3课文讲解演示文稿.ppt

part I:(para1-5)
part II:(para6-11)
part III:(para12-17)
para IV:(para18-20)
THE CASE AGAINST MAN (PART I)
控告人类
para I:
The first view--think of mankind as a thing in itself.
The second view--think of life as a thing in itself.
It is part of an intricate web of life.
It is part of the intricate structure of a bathed by energy from the Sun.
Are they right?
If any animal is isolated totally from other forms of life, .
If isolated from water,
If isolated from air,

If isolated from the Sun,
then death by starvation will surely follow
death by dehydration will follow
even faster.
whether free or dissolved in water,
death by asphyxiation will follow still faster.
animals will survive for a time, but plants would die, and if all plants died, all animals would starve.
The ocean, atmosphere, and solid crust are independent of each other after formation?
Nor were ocean, atmosphere, and solid crust independent of each other after formation. There is interaction always: evaporation, condensation, solution, weathering. Far within the solid crust there are slow, continuing changes, too, of which hot springs, volcanoes, and earthquakes are the more noticeable manifestations here on the surface.
The earth has undergone a vast evolution. When it first came into being, it very likely lacked what we would today call an ocean and an atmosphere. These were formed by the gradual outward movement of material as the solid interior settled together.
How life is formed?
Between 2 billion and 3 billion years ago, portions of the surface water, bathed by the energetic radiation from the sun, pounds anization sufficiently versatile to qualily as what we call "life". Life forms have e plex and more various ever since.