Multi-touch is essential in this model, users will expect to pick up an item with one finger and scroll the screen with another.

在这套框架下多点触摸变得很基本，用户可以用一根手指摁住物体，同时另一根手指滚动屏幕。

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According to contrast index curve model and hyperbolic model results, the power of multi- Item type prediction accuracy is higher than the latter two.

对比指数曲线模型和双曲线模型的结果可知，幂多项式模型的预测精度均高于后两者。

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