Notice that the yellow fields inside of the heart appear paler than the fields forming the contour of the heart, which appear to be a darker shade of yellow/orange.
你可以看到图中心形里边的黄色比构成心形轮廓的颜色更浅一些，心的轮廓好像是颜色更深的黄或橘黄。
The contour of the old building thus remains visible, and the inside can be seen from outside.
因此，旧建筑物的轮廓仍然可见的，并可以从外面看到里面。
Point is inside selected contour.
点位于选中轮廓内。
Point is inside selected contour.
点位于选中轮廓内。
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