The skins are first soaked in pits filled with lime-water-that is, water with which some quick-lime has been mixed.

首先, 人们将毛皮放入（由生灰与水混合而成的）灰水。

To make cement, that quicklime is mixed with volcanic ash.

为了制造水泥，将生灰与火山灰混合。

On it, were the prices of quicklime, q uicksand and quicksilver.

上面是生灰、流沙和水银的价格。

For instance, the limestone used to make quicklime must be very pure.

例如，用于制造生灰的灰常纯净。

Mixing quicklime with water can produce a lot of heat -- and possibly an explosion.

将生灰与水混合会产生大量热量 - 并可能引起爆炸。

And the texts said that mixing quicklime with hot ash and then adding water could make a lot of heat.

文字上说，将生灰与热灰混合，然后加水可以产生大量热量。

The researchers suspected the key was something called " hot mixing." It uses dry bits of calcium oxide, a mineral that's also called quicklime.

研究人员怀疑关键在于所谓的“热混合”。它使用干燥的氧化钙，一种也称为生灰的矿物质。

Limestone is refined to produce calcium oxide, or quicklime, for cement, in a reaction known as calcination, which releases a lot of carbon in the form of CO2.

灰被提炼以生产用于水泥的氧化钙或生灰， 在称为煅烧的反应，该反应以 CO2 的形式释放大量碳。