在公元前200年左右的中国，他们发现通过在粘土中添加矿物质可以改善陶瓷的外观和强度。
In China at around 200 BC, they discovered that by adding minerals to the clay they could improve both the appearance and the strength of the ceramics.
其他可靠的证据表明，边界粘土的沉积不可能需要100万年。
Other reliable evidence suggests that the deposition of the boundary clay could not have taken one million years.
在比利时，为了等待地下实验室对储存罐释放热量将引起粘土何种反应的研究取得结果，最后的决定已经推迟了10年。
In Belgium a decision has been postponed for 10 years to enable an underground laboratory to continue investigating how clay reacts to heat released by the storage canisters.
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