As can be clearly seen from the graph/table/chart (As is shown in the table/figure), great changed have taken place in_______, The _________ have/has skyrocketed/jumped from _____ to _____.

　　When it comes to the reasons for the changes, different people give different explanations. Here I shall just give a few.To begin with, ______What’s more,___________, Last but not least, ________.

　　While it is desirable that ___________, there are still some problems and difficulties for __________ Firstly, __________ ,In addition, __________ ,In a word, __________