例如他们发现，如果添加的废棉纱过少，纸张就会薄而易碎而且色泽不均。

For example, it turned out that adding too little cotton led to flaky and unevenly coloured paper.

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计算机具有一个特别的挑战——虽然它们能够添加动画和交互，但它的信息分布密度比纸张低。

Computers present a particular challenge-although they can add motion and interactivity, computer displays have low information density compared to that of paper.

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实验结果表明，在植物纤维中添加一定量的石膏微纤维，纸张的物理强度明显提高。

The results showed that the physical strength improves obviously if certain amount of the plaster tiny fiber is added into the plant fiber.

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