They originally believed because ice is less dense than liquid water, applying your concentrated weight through an ice skate adds enough pressure to destroy the ice's molecular structure making it melt.

他们最初认为，因为冰的密度比液态水小，所以通过溜冰鞋施加集中的重量会增加足够的压力来破坏冰的分子结构，使其融化。