依次将每个饼图分区设为透明，并且随后将拼成的背景图像应用到饼图中。
Each pie sliced is, in turn, set to transparent, and the Mosaic background image is then applied to the pie graph.
当浮油没有在图片部分区域里，可能是被黑色背景大海依着而难以察觉。
When the oil slick is not in that part of the image, it may be imperceptible against the dark background of the ocean.
建筑的分区隔断和内墙被剥离，显示了现有的砖围墙，用作主要办公区的背景。
The partitions and interior walls were peeled back to reveal the existing perimeter brick walls and serve as a backdrop for the main office area.
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