Latent heat is absorbed or released whenever matter changes phase, as when matter changes from liquid to gas, for example, or from gas to liquid.

潜热在物质形态变化时被吸收或释放，例如当物质从液体变为气体或从气体变为液体时这一过程就会发生。

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In recent years there has been a greater understanding of the complex structural changes taking place during heat treatment, with the help of phase transformation diagrams.

在近几年里，借助于相位变化图，已经对热处理过程中发生的复杂的结构变化有了很多的了解。

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From both electro-synthesis experiments and nanothermodynamics, the phase states and size changes of heat-treated titanium dioxide powders, synthesized by direct electrolysis, are investigated.

从电合成实验和纳米热力学两方面，考察二氧化钛热处理时的相态和尺寸变化规律。

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