Therapiddevelopmentofscienceandtechnologyhasbroughtaboutgreatchangestohumanlife.Thegreatbenefitsbroughtaboutbythisprogressishailedineverycorneroftheworld.Newelectronicapplianceshavemadeourlifesimplerthaneverbefore.Newinventionshavehelpedustoorganizeourdailyactivities.Ourjobcanbedonefaster.MobilesandQQhavemadeiteasiertocommunicatewithotherpeople.Internethasenabledustoknowandunderstandothercultureandsocietybetter.

　　However,Thedisadvantagesaboutthisdevelopmentshouldnotbeneglected.Someofscientificinventionshaveevencausedgreatharmsordisasterstomankind.Forexample,advancedtechnologycanbeeasilymanipulatedbyirresponsiblepersons.Besides,We'llbetoodependantonit.Whentechnologyfails,wearehelpless

　　Sometimes,itaffectsourhealthandlifestyles(we'llbecomplacentandlazy.)Thechemicalsmaybehazardous).What'sworse,Scienceandtecnologymayevendestroyoursimpleandhealthylife(SometimesHowwemissthetraditionalstyleofliving!).Inaddition,Theappearanceofnewtechnologymayinvadeourprivacy.

　　Tosumup,humansmustbealertagainstthepossibleharmwhileenjoyingthebenefitsfromthem.