Right click your Background Layer in your Layers Palette, and choose "Layer from Background..." It automatically renames as Layer 0.

右击图层面板的背景图层，然后选择“来自背景的图层…”它自动重命名为0图层。

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Right-click on that layer, select Layer from Background from the menu that appears, and then click OK.

右击那个图层，从菜单里选择背景图层，点击确定。

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This layer intercepts requests from the user and in the background, communicates with the server quietly and asynchronously to get the desired content of an HTTP protocol.

该层拦截来自用户的请求，然后在后台与服务器通信并异步获得所需的HTTP协议内容。

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