他先切下一块圆心角60度的扇形，把这块颠倒过来，糖衣放在下面。
He cuts a piece forming a circular sector of 60 degrees and flips the piece upside down, with the icing on the bottom.
他先切下一块圆心角60度的扇形，把这块颠倒过来，糖衣放在下面。
He cuts a piece forming a circular sector of 60 degrees and flips the piece upside down, with the icing on the bottom.
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