katepisternum

例句：

1. 1. The katepisternum is a rare and valuable fossil found in the desert.
   这个化石是沙漠中一种罕见的宝贵化石。
2. 2. The katepisternum was discovered by a team of scientists during their research expedition.
   这个化石是在科学家研究探险队中发现的。
3. 3. The katepisternum has been studied for its potential use in medicine and other fields.
   这个化石已被研究用于医学和其他领域的潜力。