Nowadays,therearemoreandmore(某种现象)in(某种场合).Itisestimatedthat(相关数据).Whyhavetherebeensomany(某种现象)?Maybethereasonscanbelistedasfollows.Thefirstoneis(原因一).Besides,(原因二).Thethirdoneis(原因三).Tosumup,themaincauseof(某种现象)isdueto(最主要原因).Itishightimethatsomethingweredoneuponit.Foronething,(解决办法一).Ontheotherhand,(解决办法二).Allthesemeasureswillcertainlyreducethenumberof(某种现象).

现象说明文

Recently_______,whatamazesusmostis______________,itistruethat__________.Therearemanyreasonsexplaining__________________________.Themainreasonis________________.

Whatismore_________.thirdly_____.Asaresult____________.Consideringallthere,____________.Foronething_____,foranother____.InConclusion______________.