ash flow

• 暴洪水流,火山灰流

ash flow的用法和样例：

例句

1. A pyroclastic flow is a ground-hugging avalanche of hot ash, pumice, rock fragments, and volcanic gas that rushes down the side of a volcano at several hundred miles an hour.
   火山灰流是热的火山灰，浮石，岩石碎片等以一小时几百英里的速度，沿着火山一侧流出。