While the RPi can be used without any additional hardware (except perhaps a power supply of some kind), it won't be much use as a general computer. As with any normal PC, it is likely you will need some additional hardware.
The following are more or less essential: 下面是一些或许必要配件:
Raspberry Pi board 万博网页版登陆页派板
Prepared Operating System SD Card 装系统的SD卡
USB keyboard :USB接口的键盘
Display (with HDMI, DVI, Composite or SCART input) :显示器
Power Supply :电源
Cables :网线
USB mouse: USB鼠标
Internet connectivity - a USB WiFi adaptor (Model A/B) or a LAN cable (Model B) :可以链接互联网的WIFI适配器(无限网卡,A/只能无线),或者有限局域网了(B,有线无线链接都可以)
Powered USB Hub :供电集线器
Case
SD card reader :SD卡阅读器
不对的地方,大家指正。