We are living in a society of innovation,every person,every family,even every country is seeking for novelty in every way and trying their best to avoid repetition. For instance,writers rack their brains to come up with new ideas for interesting works;journalists go all out to search for the latest news;composers have to write out something special to attract the audience;and as for teachers,they must always keep updating themselves in order to catch up with the fast-developing world...……
