The dinosaur became extinct before the appearance of man.恐龙在人类出现以前就灭绝了。
Tyrannosaurus Rex was a large, meat-eating dinosaur. 霸王龙是一种巨大的食肉恐龙。
I read an interesting book about dinosaurs.我读了一本关于恐龙的书。
The brontosaurus was one of the largest of all dinosaurs. 雷龙是所有恐龙中最大的一种。