我们经常这样做纸环的。

We often make paper chain like this.

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通过对纸蜂窝结构特性和压缩破坏机理的分析，建立以原纸环压强度为控制的纸蜂窝结构面外载荷理论模型和临界载荷计算方法。

The model and calculating method for determining the out-plane load of paper honeycomb were established based on the ring crush strength of paper.

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妈妈至今都不知道，多年前当她小心翼翼地把纸链从树上一环一环取下来时，我正在另一个房间里看着她所做的一切。

Mom still does not know that many years ago I was watching from the other room as she delicately removed the chain from the tree, one link at a time.

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