Once it has cooled, this slag can be used to make bricks or to pave roads.

一旦冷却，这种熔渣就可以用来制砖或者铺路。

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Metals and other inorganic materials that do not turn into gas fall to the bottom of the chamber as molten slag. Once it has cooled, this slag can be used to make bricks or to pave roads.

金属以及其它不能转化为气体的无机材料会落在密室的底部，成为熔渣，冷却下来可以用来作砖或铺路。

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A bituminous material, such as asphalt, used to pave roads.

一种含沥青物质，如沥青，用于铺路。

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And in 1955, by the way, we could afford to pave roads.

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So in case people are wondering whether or not the Recovery Act has created jobs and opportunity for businesses, talk to Chuck. (Laughter.) The new equipment he's ordered to help pave these roads will save an additional 40 jobs on an assembly line out in California.

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Alas, Congress always finds unmet needs to meet, bureaucrats to hire and roads in West Virginia to pave.

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