雅思写作辅导:范文118篇(含小作文)part 24

英语自学网

　　The flow diagram shows how a forest is regenerated in a national park after
being destroyed by fire. The following report describes the process in greater
detail.
        　　First of all, the forest is hit by lightning and a fire breaks out. The
fire spreads quickly because the trees are very close together and there are
also old pieces of wood lying on the ground and as a result the forest is
completely destroyed by the fire. However, after the forest has been burnt down
the ash from the trees fertilizes the soil and creates ideal condition for plant
growth.
        　　In the next 50 years seedlings from the trees begin to grow and the trees
continue to grow until the forest is back to its former state, which takes 300
or more years.
        　　In conclusion, forests can regenerate themselves, but it takes a long time
and as forests are important for the environment, their protection is also
important.