sphaeridium

例句：

1. 1. The mineral deposit is characterized by its spherule structure.
   该矿物矿床以其球粒结构而著称。
2. 2.The study of spherule structure is crucial for understanding the formation process of minerals.
   研究球粒结构对于理解矿物形成过程至关重要。
3. 3.The spherule structure of the rock can be used as an indicator of its age.
   岩石的球粒结构可以作为其年龄的指示器。