It is way more sticky when it is cold.

变凉的时候更粘。

youdao

You have to choke the engine when it is cold.

当发动机冷却的时候，你要阻塞住它的气门。

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Revenge is a dish that tastes best when it is cold.

复仇是一道冷却后的最美味的佳肴。

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When it is cold outside, the president and his family can warm up near one of the White House's twenty-eight fireplaces.

VOA: special.2009.05.08

When something hot, it's got a higher temperature than when something is cold.

当某样东西是热的时，它的温度,比冷的东西要高。

麻省理工公开课 - 热力学与动力学课程节选

The food is slow in coming out and when it's come, it's cold and not even delicious.

上菜等了半天，等到的食物却是凉的，更不用说好不好吃了。

Let's 课堂 - SpeakingMax英语口语达人

Winter is always the most difficult time for the health service - illness and injury increase when it is cold.

BBC: The consequences of a busy day

Bluetongue is quiescent over the winter, when it is too cold for midges.

ECONOMIST: Bird flu

Cavity wall insulation slows down the rate at which warm air escapes your property, keeping each room of your house warm even when it is bitterly cold outside.

FORBES: How To Winterize And Heat Your Home For Less