Loosen window track nuts and slide track off of the window.

放松车窗轨道螺帽并且将轨道滑离车窗。

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The parent window keeps track of whether the item has child items.

父窗口保留有该项是否包含子项的记录。

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The parent window keeps track of whether the item has child items.

父窗口保留有该项是否包含子项的记录。

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