Whenthesteamengine(蒸汽机)wasi1 inthe18thcenturyitbeganoneoftheg2 revolutions(革命)thathadeverhappenedinourworld.Thei3 ofthepetrolengine(内燃机)attheendofthe19thcenturyledothergreatc4 inourlives.Andthecomputerisaninventionmoreimportantthantheseenginesw5
JustastherewasaStoneAge(石器时代).anIronAge(铁器时代)andsoonwehavebeen1 6 forcenturiesinaPaperAge.Andalmostallinformationwask7 ands8 onpaper andsomuchofitiswastedafterithasbeenusedo9 thatalargenumberoftreeshavetobecutdowneveryyeartomakepaper.Butnowwiththecomputeralotofinformationcanbestoredandsentw10 anypaperatallusingsmalldiscs(碟片)ormagnetictapes.
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