其中一个珠子用针固定在玻璃表面，它转动的时候另一颗珠子就会围绕着它旋转。

One of the beads was pinned to a glass surface so that as it spun the other rotated around it.

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观看教练准备日常教程的表演也是一种激励，他们会用头撞断铁棒，并投掷大头针击破玻璃。

For inspiration, watch the coaches prepare for daily tourist performances, in which they snap iron bars with their heads and break glass by throwing a pin at it.

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工厂是否建立了严格的利器控制程序，以防剪刀，刀具，刀片，碎玻璃，针混入产品。

Factory implements strict sharp tools control procedure to prevent scissors, knives, blades, broken glasses and needles tto be mixed with product.

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