pregonium

例句：

1. 1.The plant's roots are deeply buried in the soil, providing a strong foundation for growth.
   这种植物的根深深地埋在土壤里，为生长提供了坚实的基础。
2. 2.The pregonium is a rare and valuable species that requires special care to thrive.
   预根是一种稀有且珍贵的物种，需要特别的照顾才能茁壮成长。
3. 3.In ancient times, people used pregonium as a medicinal herb to treat various ailments.
   在古代，人们使用预根作为药用植物来治疗各种疾病。