So another possibility is that the friction from your shoe rubbing against the ice creates enough heat to melt it.

所以另一种可能性是你的鞋子与冰摩擦产生的摩擦力产生足够的热量来融化它。

First, when the thickened layers of the pericardium rub up against each other - it creates a friction rub which can be heard on auscultation.

当增厚的两层心包膜互相摩擦，可在听诊时闻及心包摩擦音。

It usually results in a friction rub, as well as ECG changes like ST elevation and PR depression, followed by T wave flattening and inversion.

通常表现出心包摩擦音，以及ST段抬高和PR段压低等心电图改变，继之呈现T波低平和倒置。