Stacked near the checkout counters, and as colorful as a Fisher-Price toy, it is a not-so-serious-looking power tool: a battery-operated saw-and-drill combination.

堆在收银台附近，像费雪玩具一样颜色鲜艳的它，是一个看起来不那么严肃的电动工具：一个电池驱动的锯和钻的组合。

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This conceptual setup is materialized by a geometrical operation, the rotation of two elements, as if it were two construction toy blocks that are stacked and handled easily.

这个概念是通过几何运算的操作来实现的，两个元素的旋转，就像是两个积木体一样容易堆放和处理。

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Off to his right, beyond a wooden gate, dozens of stuffed animals and toy cars were stacked neatly on shelves lining the wall, held up as special rewards rather than put out every day as objects for play and learning.

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