2) 描述具體數(shù)據(jù)變化

　　increase/decrease by...

　　increase from ... to...

　　increase steadily from...

　　There was a marked increase in ...

　　There has been a rapid increase in ...

　　an increase of

　　decline in ...

　　four times as much as ...

　　amount to

　　fall from ... to...

　　appear stable

　　reach 5,000 million in 1998

　　continue to grow

　　has been growing faster and faster since ...

　　less than

　　up to

　　compared with

　　make up

　　the number of ... remains the same as ...

　　the remaining

　　3) 分析原因

　　There are chiefly two reasons for the changes.

　　...is mainly caused by ...

　　This directly relates to the problem of (the world's food, housing, job shortage...)

　　What caused these changes? ...

　　The reasons that caused changes are diverse. On the one hand, ...On the other hand, ...

　　The rapid growth of ... owes much to...

　　lie in

　　lead to

　　4) 總結(jié)歸納

　　Through the analysis, we can draw a conclusion that ...

　　In short, ...

　　Steps should be taken to ...

　　To solve the problem of ..., we ...

　　From all the facts given above, we can see ...

　　Taking the advantages and disadvantages together into consideration, I believe...