如果膨胀系数相差较大，在冷热交替的时候就会出现瓷层裂纹或爆瓷现象。

If there is a large difference in the coefficient of expansion, there will be cracks in the ceramic layer or the phenomenon of exploding porcelain in the alternating heat and cold.

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在冷热流感季节，记住做好六大预防工作。就能把感冒那些日子用去度假，做更有趣的事情。

Remember to take these six precautions during cold and flu season and save those vacation days for more fun activities than sniffling and sneezing.

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木结构建筑在冷热气候环境中都表现出了优秀的节能性能，这将为我国减少能源消耗做出贡献。

Wood frame construction's remarkable efficiency at conserving energy in both hot and cold climates will help this country deal with its energy crisis.

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But the roles are reversed in the following passage, and this is where the text blows hot and cold.

但是在接下来的文章中角色互调了，这是文中描述冷热无常的情景。

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