鼠标的滚轮和ipone都可以进行动作感应，但是只有手势感应允许动作在三维空间内进行。
Beyond motion sensing, which a mouse rolling on its trackball already does handily, or iPhone pinching, gesture sensing can allow movement in three dimensions.
手势、面部表情和肢体动作占人际交流组成部分的93%，只有7%的理解判断源自口头语言。
Gestures, facial expressions and body movement compose ninety-three percent of communication — only seven percent of understanding derives from words.
可以是每次乘车都必听的一首歌，一个傻傻的握手或者是没人能懂的手势，或者是只有你俩的一周一次的活动。
That could be a song you belt out on every car ride, a goofy handshake or gesture that no one else understands, or a weekly ritual just for the two of you.
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