For example, in the painting “The Virgin and Child with St Anne”, the virgin's face is shadowed by glaze that contains different pigments to those in the shadowing glaze on the child.

比如，在油画《圣母子与圣安妮》中，圣女的脸上的阴影部分涂上的罩色漆与婴儿身上的罩色漆所含成分不同。

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Then the queen was permitted to answer, but she remained hard, and said, "No, I did not open the forbidden door;" and the Virgin Mary took the new-born child from her arms, and vanished with it.

王后仍然回答：“没有，我没有打开那扇门。” 圣母只好又从她怀里夺过孩子，带着他回天国去了。

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Agostino panels, together with the Clark's large, elegant "Virgin and Child Enthroned With Four Angels" (c.1460-70) the one Ms. Frick wanted and couldn't have.

WSJ: Separated at the Altar | Piero della Francesca in America | Frick Collection | By Karen Wilkin