一、First of all,the use of mobile phone is harmful to health.Electromagnetic waves alter [electric activity of the brain] and cause disturbance in sleep 1.It also causes difficulty in concentration,fatigue,and headache [2]; and increase reaction time in a time-dependent manner [3].They increase the resting blood pressure [4] and reduce the production of melatonin [5].They are also implicated in DNA strand breaks [6].第一个缺点就有六个说理.
二、Second,mobile phones have bad effects on children.
Children that grow up in our new cell phone world are exposed to microwave radiation from the moment they are in the womb.However,the effects of microwave radiation on infants is unknown to most parents.The Stewart Report is a report commissioned by the British Parliament in response to fears that cell phone use could be linked to memory loss,and even Alzheimer’s Disease.It explains the effect of cell phone radiation on children.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,the using of mobile phones while driving may cause fatal car accidents.
A simple Google search will show hundreds of studies on the subject of mobile phone use and driving.All the studies I have seen agree that mobile phone use while driving increases the risk of an accident.This increased risk is due to the inability to fully focus on driving while,and shortly after,talking on a mobile phone.
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.