A concrete base follows the same shape as the roof and both feature vertical markings on their edges.

混凝土基础遵循与屋顶相同的形状，并且在其边缘上都具有垂直标记。

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They then lay the blocks on their edges to form a circle, cutting them to size as they go, so that the end result will be a narrowing spiral.

再把雪块铺在他们盖屋子的地点围成一个圆圈，修整到需要的尺寸大小，最后形成窄小的螺旋形。

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Sitting on the rocks with my husband, I watched some parents nervously guarding their kids away from the rocks' edges.

我和丈夫坐在岩石上，看着一些父母紧张地保护他们的孩子远离岩石边缘。

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Ballroom dancers tend to roll and pivot on the edges of their feet, using a series of muscles and tendons to achieve a balance and dexterity honed with years of practice.

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The square pieces on the worn-out board have lost their edges to age and usage.

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By focusing on the edges separating dark from light areas, the researchers classified their dozen cities into three types.

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