Each of these approaches has drawbacks: Most touch screens do not provide tactile feedback, so the user is forced to look away from his TV to actuate a touch screen control.

 
  • 这两种方法有各自的缺点,很多触摸屏都没有触感反馈,这样用户必须要抬头看电视屏幕才知道刚才的触摸动作是否是正确的。
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