is shown by the graph, ...

　　11) it can be seen from the statistics that ...

　　12) it is generally believed /accepted/thought/held ...

　　●说明原因的句型:

　　1) there are some/two/many good reasons for.../to do...

　　2) we have two good reasons for...

　　3) the reason for ... is that + 从句

　　4) among the most convincing reasons given by people for..., one should be mentioned...

　　5) one may think of the trend as a result of...

　　6) the change in... largely results from the fact that...

　　7) there are several causes for this significant growth in... irst...

　　8) a number of factors could account for the ....

　　9) it is no simple task to give the reason for ...

　　10) the cause of /reason for higher prices was an increase in demand.

　　11) because/as/now that/since the demand has increased, the prices are higher.

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