scoriae

例句：

1. 1. The volcano erupted, spewing out a cloud of scoriae.
   火山爆发了，喷出了一团火山灰。
2. 2.The smoky haze from the volcano covered the sky with scoriae.
   火山冒出的烟雾将天空染成了灰色。
3. 3. The scientists collected samples of scoriae to study its chemical properties.
   科学家们收集了火山灰样本，研究其化学成分。