In colder weather, your cat will curl up into a tight, heat-conserving ball.

在更冷的天气里，你的猫会蜷缩成紧紧的一团来保暖。

《柯林斯英汉双解大词典》

Once heat is applied, it shrinks again, creating an air-tight, durable wrapping.

一俟加热，它再次收缩，形成一个气密而耐用的包装。

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Using passive house principles, the structure is heavily insulated, as air-tight as possible and employs a high-efficiency heat exchanger to maximize energy efficiency.

采用被动式原则，建筑高度绝缘，尽可能地采用密封空间，并使用一个高效率的热交换器使能源利用效率最大化。

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He said the new integrated temperature control system was like a giant television remote control which would allow for very tight control of heat and electricity consumption.

BBC: Energy efficiency boost at Eden Project

In a 10-inch ovenproof pan with a tight-fitting lid, briefly heat the cumin, coriander, and cardamom over medium heat to toast, shaking the pan to prevent scorching.

NPR: Recipes: 'Screen Doors and Sweet Tea'

But the deeper lines are trickier: space is so tight that there is nowhere for waste heat to go, which makes traditional air-conditioning impossible.

ECONOMIST: London Underground