名词 dinosaur:

1. any of numerous extinct terrestrial reptiles of the Mesozoic era

dinosaurn.恐龙n.(俚)过时、落伍的人或事物dinosaurologistn.恐龙学家dinosaur fossils恐龙骨化石dinosaurologicaladj.恐龙学的dinosaur embryos恐龙胚胎dinosaur resources恐龙资源dinosaurs and birds恐龙与鸟dinosaur egg fossil恐龙蛋化石dinosaur bone fossil恐龙骨骼化石dinosaurs extinction恐龙灭绝dinosaur egg-bird egg恐龙蛋-鸟禽蛋

1. The dinosaurs disappeared long ago.
   恐龙很久以前就绝种了。
2. Dinosaurs have been extinct for millions of years.
   恐龙已绝种几百万年了。