It is thought that millions of years ago this liquid mass pushed upward through cracks in the earth's crust. As the liquid cooled, the carbon changed into diamond crystals.

人们认为，千百万年以前液态熔岩从地球的深处通过地壳的裂缝向上挤，液态熔岩冷却后，其中的碳便变成了钻石晶体。

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As the air is cooled, the remaining water vapor is condensed into a liquid form.

由于空气冷却，剩余的水蒸汽凝结成液体的形式。

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Now the refrigerant, as a high-pressure, cooled liquid, confronts a flow restriction which causes the pressure to drop.

制冷剂就变成了高压冷却的液态，然后经过一个节流器，节流器使其压力下降。

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The company is also experimenting with a new way of storing the hydrogen that will fuel its cells a fabric made of fibres of activated carbon that can (when cooled with liquid nitrogen) soak up the same amount of energy per kilogram as petrol.

ECONOMIST: Clean living in Iceland