1、The hailstorm turned into graupel, covering the ground with small icy pellets.

这场冰雹转变成了霰雪，把地面覆盖着小冰粒。

2、I had never seen graupel before, it was a unique and fascinating weather phenomenon.

我以前从来没见过霰雪，它是一种独特而迷人的天气现象。