He has spent so long tap-tap-tapping on electronic gizmos of one kind or another that he has completely missed out on the skill of forming legible characters with his own hand.
他长久以来一直是“嗒嗒”地敲着一种或者其他的电子小装置以致他完全忘记了用自己的双手拼词组句的能力。
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Their Imaginary Phone relies on a depth-sensitive camera, similar to ones used in Microsoft's Kinect for Xbox, that would detect the swiping and tapping motions on your hand.