orthopyroxene

例句：

1. 1. The mineral orthopyroxene is a key component ofthe Earth's crust.
   矿物橄榄石是地球地壳的关键成分。
2. 2. The crystal structureof orthopyroxene is similarto that of olivine.
   橄榄石的晶体结构与辉石相似。
3. 3. Orthopyroxene is often found inmetamorphic rocks, where it can beused as a marker for ancient volcanic activity.
   橄榄石通常存在于变质岩中，可以作为古代火山活动的标记。