To extract the nickel the rocks have to be smelted at really high heats.

为了提取镍，这些岩石必须在非常高的温度下熔炼。

To make the plough, miners, smelters, and smiths, -woodcutters, sawyers, and carpenters, -must have laboured.

要有犁田的人、矿工、熔炼工、收割的人--还有伐木工、锯木匠、木匠，必须雇佣。”

That's where the furnace is and where all the metal was smelted and the tools were cast, as you'll be able to see.

炼铁炉就在这，所有的金属在这熔炼，工具也在这铸造，后面你可以。

The big stone building at the top is the main workshop, that's where the furnace is and where all the metal was smelted and the tools were cast as you'll be able to see.

顶部的大石头建筑是主车间，那有熔炉，所有的金属是在这熔炼的，工具也是在这铸造的，你们可以。

As a result, more smelting was required, Koutsodendris said.

库索德表示，因此需要进行更多熔炼。

So you melted a bunch until you just have gold.

于是你不断熔炼，直只剩下纯金。

Metal recycling for example, you know, all those cans and all the the bulk metal, that's gonna be sorted by metal type, and re-smelted back into things that make new things.

例如金属回收，你知道的，那些罐头和块状金属，将按金属类型分类并重新熔炼成制造新事物的东西。

The diffusion hypothesis states that smelting was invented in a single place, and subsequently spread diffused from region to region.

扩散假说认为熔炼是在一个地方发明的 随后从一个地区扩散另一个地区。

The heart of most battery recycling is a process called smelting, which is basically just melting the metallic parts.

大多数电池回收的核心是一个叫做熔炼的过程，也就是将金属部分熔化。

In what furnace was thy brain?

什么样的熔炉将你的头脑熔炼？

And within 4000 years, smelting came to be practiced throughout Europe and Asia.

4000年之内 熔炼开始在欧洲和亚洲盛行。

That said there's not much evidence. Smelting arose independently in multiple places.

也就是说没有太多的证据 熔炼是在多个地方独立产生的。

Ignoring materials that simply need high heat to smelt or refine, fossil fuels are literally a building material we use to make our products and feed our population.

忽略那些只需要高温来熔炼或精炼的材料，化石燃料实际上是我们用来制造产品和养活人口的建筑材料。

Canadian hydroelectric power makes it three times cheaper to smelt aluminium in Canada than it is in the U.S.

加拿大水力发电使得在加拿大熔炼铝的成本仅为美国三分之一。

As they learn to take control over fire, people use the dissipating energy to warm their caves, cook their food, and finally to smelt and forge objects made of metal.

随着人们学会控制火，他们利用这些散失的能量来温暖洞穴，烹煮食物， 最后用来熔炼和锻造金属制品。

I expect that the contents of his stomach have been smelted into a magical mass that, united with his constitution, has made him almost indestructible.

我预计他胃的东西已经被熔炼成一团神奇的物质，与他的体质结合在一起，使他几乎坚不可摧。