They say the biggest risk comes from the volcano's snow cap melting and trigering massive floods and mudflows.

称火山最大的风险是让雪盖融化导致大规模洪水和泥流。

The city was buried in an angry torrent of mud 10 feet deep.

这座城市被在 10 英尺深的愤怒的泥流中。

It's located in the southwestern part of Colombia and the flooding washed a stream of mud into Mocoa.

它位于哥伦比亚的西南部，洪水将一股泥流冲进了莫科亚。

A mixture of mud, water, and other debris, called a lahar, can flow down and bury nearby cities.

泥浆、 水和其碎屑的混合物， 称为火山泥流， 会流下来附近的城市。

The fossil—dated to about 125m years ago, during the Cretaceous period—was formed when a flow of boiling volcanic mud engulfed two animals seemingly locked in mortal combat.

这块化石可追溯到大约12500万年前的白垩纪时期，当时沸腾的火山泥流吞没了两只似乎陷入殊死搏斗的动物。