Hot and cold are opposites.

热和冷是一对反义词。

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Symptoms of the cold are more common, and can make the patient miserable for three to five days.

感冒症状较为普通，并可让患者难受3到5天。

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Emperor penguins huddled together against the cold are using coordinated waves of movement to stay tightly packed together.

帝企鹅们挤在一起，通过用协调的摇摆动作紧挨在一块来抵抗寒冷的环境。

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The Prime Minister said he understands that people in shelters are cold and do not have enough food.

VOA: special.2011.03.19

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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you are concerned because you have a cold and you need to go work and you want to be seen.

你有点担心，因为你有点感冒，但还是得上班，而你想尽快让医生检查一下。

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"I'm always worried about the sitter -- are they cold, are they hot, are they comfortable -- and photography today is so accurate and so good that it is really so much easier just to take photographs and work from that, " he said.

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Hot summers (in the U.S.) or wet ones (in the U.K.) are invoked as support for climate alarmism, whereas cold winters are dismissed as weather.

WSJ: Matt Ridley on Confirmation Bias and Global Warming | Mind & Matter

The plates are icy cold, there are no other diners, and there is no radio music but only the clink of our cutlery as we try to separate parts of the stringy chicken.

NEWYORKER: Amundsen