或者也可以这样说:Salesdeclinedslightly/deramtically/substantially.Theimportanceoftheproductlifecycletomarketersisthis:Differentstagesintheproductlifecyclecallfordifferentstrategies.Thegoalistoextendproductlifesothatsalesandprofitsdonotdecline.Onestrategyiscalledmarketmodification.Itmeansthatmarketingmanagerslookfornewusersandmarketsections.Didyouknow,forexample,thatthebackpacksthatsomanystudentscarrytodaywereoriginallydesignedforthemilitary?
Marketmodificationalsomeanssearchingforincreasedusageamongpresentcustomersorgoingforadifferentmarket,suchasseniorcitizens.Amarketermayre-positiontheproducttoappealtonewmarketsections.
Anotherproductextensionstrategyiscalledproductmodification.Itinvolveschangingproductquality,features,orstyletoattractnewusersormoreusagefrompresentusers.Americanautomanufacturersareusingqualityimprovementasonewaytorecaptureworldmarkets.Note,also,howautomanufacturersoncechangedstylesdramaticallyfromyeartoyeartokeepdemandfromfalling.
二三两段我们又可以学到对某个概念下定义的两个句型:
另外,大家要注意文章第一段为第一层,二三两段为第二层,第四段为第三层.
Onestrategyiscalledmarketmodification.
Anotherproductextensionstrategyiscalledproductmodification.
另外，同学还必须熟悉文章中的单词用法和考点（比如例证考点等）
比如lifecycle,generalacceptance,extendone'slife,等等，
