1、Scienceandtechnologyhavebeenbringinghumanbeingstremendousbenefits.Thankstoscienceandtechnology,wenowlivecomfortablyandconvenientlyinhousesfurnishedwithairconditioners,refrigerators,washingmachinesandtelevisionsetc.Thankstoscienceandtechnology,wecaneatfreshvegetablesatttheyearround.Thankstoscienceandtechnology,wecantraveltongdistancesinthefractionofasecondonplanes,trainsandcars.Thankstoscienceandtechnology,wewearclotheswithsyntheticmaterialswhichcannoteasilybewornout.

　　However,scienceandtechnologyhaveatsobroughtusatotofdisasters.First,becauseofthemanybreakthroughsinthefieldofmedicine,peoplearenowlivingmuchlongerthantheyusedto.Asaresult,thepopulationoftheworldisincreasing,causingtotsofproblems.Second,becauseofthedevelopmentofindustry,totsofthewastesfromfactoriespourintotheairandrivers,causingpollutionofattkinds.Third,someterroristsareusingscienceandtechnologyagainstmankind.Theyusebiological,chemicalandunclearweaponstothreatenworldpeace.

　　2、

　　Nowadays,ourliveshavegreatchanged.Why?Becausescienceandtechnologyaredevelopingcontinuouslyandthedevelopmentofscienceismakinginfluenceonourideasoflife.

　　Atearlyage,peopleonlywantedtogetsufficientfoodandclothes.Theydidn’tknowhowtodealwiththechallengefromnature,suchasbadweather,animals’attackandsoon.

　　Then,peoplebegantoknowsomeofworldandlearntsometechnology.Theywerenolongersatisfiedwiththebasicrequirements.Theybegantomakeanattemptatobtainingfortunebymakingfulluseofnaturewiththehelpofscience,inspiteoftheilleffectonthesurroundings.

　　Now,wehaverealizedthatweshouldconsiderfornotonlyourselvesbutalsofuturegenerations.Sowelayemphasisonenvironmentalprotectionatthemomentthatwedeveloptheeconomy.Weknowmoreandmoreaboutourselvesandworld.Meanwhile,wefindthatwejustlearntalittleinthefact.Asaresult,peopledomoreandmoreexplorations.And,theexplorationspromotethedevelopmentofsocietysothatourliveschange.

　　Ibelievethatourliveswillbebetterandbetterwiththedevelopmentofscienceandtechnologyandthechangeofourthinkingoflife.