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关于地球的英语精选作文——
earth
The
area
of
desert
in
the
world
is
growing
every
year.
Many
parts
of the world which
once had large populations and produced
plenty of crops, have become deserts.
Dunhuang in China, deep
in the heart of
the Gebi Desert, was once a great city.
Cattle are one cause of the problem. In
good years, famers
increase
the
numbers
of
their
cattle.
Then
one
year,
the
rains
fail
to
come.
The
farmers
do
not
want
to
kill
any
of
their
cattle,
so
the
cattle
eat
ail
the
grass
and
anything
that
grows
on
poorer
land.
If
this
continues
for
several
years,
the
grass
never
grows
again and the land
becomes a desert. One suggested answer is
for farmers to limit the numbers of
their cattle.
Another
problem
is
that
good
soil
is
gradually
lost.
When
trees
are
cut
down,
there
is
nothing
to
hold
the
soil
in
place
on
the
hillside. So when if
rains, the soil is washed down the hills
and into the rivers. Strong winds can
also blow away the
valuable soil that
lies on the top of the fields.
地球本是多方位，
包罗万象的，但作者从地球的沙漠化方面考虑，列
举了造成此情况的原因，暗示人类要注
意这个严重的问题。
这是一篇很好的原因
结果式文章。先陈述结果，后列举原因。
地球
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