At high pressures such as under an ice cap, they reckon that rocks cannot expand to turn into liquid magma even if they are hot enough.

他们认为在冰帽的强大压力下，即使温度很高，岩石也不可能成为液体熔岩。

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Viscosity improvers are polymers with molecules that expand when they get hot.

粘度改良剂是聚合物分子，当他们得到扩大热点。

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If we compress a gas, it becomes hot; if we allow it to expand, it cools.

如果我们压缩气体，它会变热；如果让它膨胀，它便会变冷。

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There comes a point when the gas is so hot it can expand out again as fast as it falls in.

BBC: University of Nottingham

In the early 1990s Jennings and Eason, who was by then running day-to-day operations, began to expand, adding hot- and cold-smoked fillets, smoked-trout dip, trout sausage, chowder and mousse to their offerings.

FORBES: Magazine Article

Tommy Franks, but he will be on the hot seat to successfully reprise and expand the role he held after the 1991 Persian Gulf War.

CNN: Garner seeks to reprise his success