A snail's shell is spiral in form.

蜗牛壳呈螺旋形。

《牛津词典》

A snails shell is spiral in form.

蜗牛的外壳形状是螺旋形的。

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A snail's shell is spiral.

蜗牛壳是螺旋形的。

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Spiral department only leave a trail, the total of the tiny part shell.

螺旋部只留有痕迹，占全壳的极小部分。

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Spiral department only leave a trail, the total of the tiny part shell.

螺旋部只留有痕迹，占全壳的极小部分。

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