默认属性组合框为数据绑定设置控件的主要属性。

The Default attribute combo box sets the primary attribute on the control for data binding.

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需要从该组件公开的主要属性是当前选中的文档。

Properties. The primary property that you want to expose from this component is the currently selected document.

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基于以上规则，模型尽可能地反映鱼群的主要属性。

Based on these behavior rules, the model can reflect the common behavior properties of fish school.

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