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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得益于精确切割技术，研究者们可以对薄如纸张的大脑切片进行深入研究。

Thanks to precision cutting techniques, researchers are able to examine a paper-thin slice of human brain.

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小不点的大脑在极大的透明的脑壳里正在成形，薄如纸张的皮肤覆盖着他的整个身体。

Your little one's brain is taking shape inside his oversized transparent skull and a paper-thin layer of skin is covering his whole body.

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