In fact, it became so valuable that it was known as white gold and spies were sent to China to discover what they did to the clay to produce such high-quality merchandise.
事实上，它变得如此珍贵，以至于被称为“白金”，间谍被派往中国，以查明他们如何处理粘土，从而生产出如此高质量的商品。
In order to give us our white paper and card, the makers will add bleach and other materials such as china clay and additional chemicals.
为了给我们提供白纸和卡片，制作商会添加漂白剂和一些其他材料，比如瓷土和其他化学品。
In order to give us our white paper and card, the makers will add bleach and other materials such as china clay and additional chemicals.
为了给我们提供白纸和卡片，制作商会添加漂白剂和一些其他材料，比如瓷土和其他化学品。
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