换热过程依靠显热完成，此时高压换热器称为气体冷却器。
物理学家费边推断，当星系间的气体冷却时，较冷的气体向星系中心收缩。
The physicist Fabian reasoned that as intergalactic gas cools, the cooler gas shrinks inward toward the center of the galaxy.
然后我们有气体冷却反应堆，那能使用超临界二氧化碳或者氦。
And then we have gas cooled reactors which can use supercritical carbon dioxide or helium.
当气体冷却，任何有毒的物质会被封在玻璃状的熔渣中，被安全的填埋。
When the gas is cooled, any hazardous elements in the waste end up sealed in a glassy slag that is safe to put into landfill.
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