有关手机的英文演讲（五分钟）

给你个网站，准保够你用的。
http://en.wikipedia.org/wiki/Mobile_phone
这是它的目录
Contents [hide]
1 Overview
1.1 Cellular systems
1.2 Handsets
1.2.1 Applications
1.2.2 Media
1.2.3 Power supply
2 Usage
2.1 By civilians
2.1.1 Culture and customs
2.2 By government agencies
2.2.1 Law enforcement
2.2.2 Disaster response
3 Business models
3.1 Tariff models
4 Impacts
4.1 Human health and behaviour
4.1.1 Safety concerns
4.1.2 Etiquette
4.1.3 Use by drivers
4.2 Environmental impacts
5 History
6 Terminology
6.1 Related non-mobile-phone systems
6.2 Terms in various countries
7 See also
8 References
9 Further reading
10 External links
10.1 tags