mosasaurus

例句：

1. 1. The mosasaur was a magnificent creature that roamed the earth millions of years ago.
   暴龙是一种壮观的生物，数百万年前在地球上漫游。
2. 2.In ancient times, mosasaur fossils were discovered in China, providing evidence of its existence.
   古代中国发现了暴龙化石，提供了它存在的证据。
3. 3.The mosasaur's extinction marked the end of the dinosaur era and paved the way for mammals to dominate the planet.
   暴龙的灭绝标志着恐龙时代的结束，为哺乳动物统治地球铺平了道路。