If we compress a gas, it becomes hot; if we allow it to expand, it cools.

如果我们压缩气体，它会变热；如果让它膨胀，它便会变冷。

youdao

Hot packs and cold compress es ease symptoms.

热敷与冷敷都可以缓解症状。

youdao

Got sty ~ hot compress useful?

得了麦粒肿~热敷有用吗？

youdao

Another hydrotherapy technique with a similar rationale is to soak the feet in a hot foot bath, as soon as possible after the stroke has occurred, while applying a cold compress to the neck, face and scalp.

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