它包含图表、动画、层级树、日历、菜单和其他元素。

It consists of charts, animations, hierarchical trees, calendars, menus, and other elements.

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首先对构成手工剪纸动画背景的剪纸图案进行分类，包括种类繁多的树、花、草、山石、建筑等。

First we classify the paper-cuts graphics of animation background with the style of paper-cuts, including a variety of trees, flowers, grasses, mountains, bridges, etc.

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第二，即使在基于单摆模型的情况下，可交互性，实时性和真实感三者在树的动画生成系统很难被同时满足。

The second, most of the previous works cannot satisfy the interactive, realizing and real-time request at the same time even though in the single pendulum assumption.

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