Mamenchisaurus

例句：

1. 1. The Mamenchisaurus was a prehistoric creature that lived millions of yearsago.
   马门溪龙是一种史前生物，生活在数百万年前。
2. 2. The discoveryof the Mamenchisaurus has sparkedinterest in paleontology.
   马门溪龙的发现激发了古生物学的兴趣。
3. 3. The Mamenchisaurushad a long tail and powerful jaws, making it one of the most fearsome creatures in its time.
   马门溪龙拥有长长的尾巴和强大的颚部，使它成为其时代中最可怕的生物之一。