How did dinosaurs become extinct?
恐龙是如何灭绝的？
an animal that lived millions of years ago but is now extinct. There were many types of dinosaurs, some of which were very large.
• 恐龙
20秒记一个单词（第2079个）dinosaur
How did dinosaurs become extinct?
恐龙是如何灭绝的？
an animal that lived millions of years ago but is now extinct. There were many types of dinosaurs, some of which were very large.
• 恐龙
