macrodontia

例句：

1. 1. Macrodontia is a rare species of shark that has been extinct for millions of years.
   大齿鲨是一种罕见的鲨鱼物种，已经灭绝了数百万年。
2. 2. The discovery of Macrodontia in the fossil record provides new insights into the evolution of marine life.
   在化石记录中发现大齿鲨为海洋生物的进化提供了新的见解。
3. 3.The Megalodon, also known as the "Silent Sea Serpent," was one of the largest and most powerful predators of its time.
   巨型掠食者，也被称为“沉默海蛇”，是其时代最大的捕食者之一。