splanchnolith

例句：

1. 1.The splanchnolith was a significant discovery in the field of paleontology.
   石心石在古生物学领域是一个重大的发现。
2. 2. The splanchnolith is believed to have formed millions of years ago during the formation of the Earth's crust.
   石心石被认为是数百万年前地球地壳形成时形成的。
3. 3. The splanchnolith has been studied for its potential applications in mineral extraction and engineering.
   石心石因其潜在的矿物提取和工程应用而受到研究。