一、Firstofall,theuseofmobilephoneisharmfultohealth.Electromagneticwavesalter[electricactivityofthebrain]andcausedisturbanceinsleep1.Italsocausesdifficultyinconcentration,fatigue,andheadache[2];andincreasereactiontimeinatime-dependentmanner[3].Theyincreasetherestingbloodpressure[4]andreducetheproductionofmelatonin[5].TheyarealsoimplicatedinDNAstrandbreaks[6].第一个缺点就有六个说理.

　　二、Second,mobilephoneshavebadeffectsonchildren.

　　Childrenthatgrowupinournewcellphoneworldareexposedtomicrowaveradiationfromthemomenttheyareinthewomb.However,theeffectsofmicrowaveradiationoninfantsisunknowntomostparents.TheStewartReportisareportcommissionedbytheBritishParliamentinresponsetofearsthatcellphoneusecouldbelinkedtomemoryloss,andevenAlzheimer’sDisease.Itexplainstheeffectofcellphoneradiationonchildren.这点你还可以根据中国的情况,谈谈学生带着手机来学校影响正常课堂,还有攀比现象

　　三、Lastly,theusingofmobilephoneswhiledrivingmaycausefatalcaraccidents.

　　AsimpleGooglesearchwillshowhundredsofstudiesonthesubjectofmobilephoneuseanddriving.AllthestudiesIhaveseenagreethatmobilephoneusewhiledrivingincreasestheriskofanaccident.Thisincreasedriskisduetotheinabilitytofullyfocusondrivingwhile,andshortlyafter,talkingonamobilephone.

　　其实你也可以谈谈有人手机不关,导致在应该保持安静的公共场合、会议场合变得不得安宁.

　　辩论加油.