Nowadays , there are more and more XX in some big cities . It is estimated that . Why have there been so many XX ? Maybe the reasons can be listed as follows.

　　The first one is that .Besides, . The third reason is . To sum up , the main cause of XX is due to .

　　It is high time that something were done upon it. For one thing , . On the other hand , . All these measures will certainly reduce the number of XX .

　　注釋：

　　(1)用具體數據說明XX現象;

　　(2)原因一;

　　(3)原因二;

　　(4)原因三;

　　(5)指出主要原因;

　　(6)解決建議一;

　　(7)解決建議二。

　　范文：Generation gap between parents and children

　　Nowadays , there are more and more misunderstanding between parents and children which is so- called generation gap . It is estimated that .

　　Why have there been so much misunderstanding between parents and children? Maybe the reasons can be listed as follows .

　　The first one is that . Besides . The third reason is .To sum up ,the main cause of XX is due to .

　　It is high time that something were done upon it. For one thing . On the other hand , . All these measures will certainly bridge the generation gap .

　　Nowadays , there are more and more XX in some big cities . It is estimated that . Why have there been so many XX ? Maybe the reasons can be listed as follows.

　　The first one is that .Besides, . The third reason is . To sum up , the main cause of XX is due to .

　　It is high time that something were done upon it. For one thing , . On the other hand , . All these measures will certainly reduce the number of XX .

　　注釋：

　　(1)用具體數據說明XX現象;

　　(2)原因一;

　　(3)原因二;

　　(4)原因三;

　　(5)指出主要原因;

　　(6)解決建議一;

　　(7)解決建議二。

　　范文：Generation gap between parents and children

　　Nowadays , there are more and more misunderstanding between parents and children which is so- called generation gap . It is estimated that .

　　Why have there been so much misunderstanding between parents and children? Maybe the reasons can be listed as follows .

　　The first one is that . Besides . The third reason is .To sum up ,the main cause of XX is due to .

　　It is high time that something were done upon it. For one thing . On the other hand , . All these measures will certainly bridge the generation gap .