The dedicated Send, end and Back buttons, and the tiny trackball for scrolling, make the G1 more flexible than the iPhone, but also more complicated.
专用的发送、结束和后退按钮，以及小巧的滚动导航键，让G 1比iPhone更加灵活，但操作也更加复杂。
The dedicated Send, end and Back buttons, and the tiny trackball for scrolling, make the G1 more flexible than the iPhone, but also more complicated.
专用的发送、结束和后退按钮，以及小巧的滚动导航键，让G 1比iPhone更加灵活，但操作也更加复杂。
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