假设过滤器开始于顶部的内容(包)层。

The filter is assumed to start from the top content (package) level.

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因此，需要同时构建结构、内容和显示这 3 个层。

So build structure, content, and presentation.

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从内容商外部招揽核心管理层的工作仍未停止。

From content business exterior the work that solicits core management layer still did not stop.

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选择当前层内容然后创建新层。

Get the selection of the current layer and create a new layer.

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选择当前层内容然后创建新层。

Get the selection of the current layer and create a new layer.

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