讨论翼龙Pterosaurs是否会飞。
Explain three reasons to contradict with reading.
1、Pterosaurs can actually be considered as warm-blooded, since they always have dense covering hair.
2、The bone structure of Pterosaurs is different. It is hollow not solid.
3、Pterosaurs are different from birds in that they stand with four limbs while birds with two limbs. And Pterosaurs are just like bats which can push off the ground.
Three reasons to explain why Pterosaurs cannot fly.
1、Pterosaurs are cool-blooded, thus cannot produce enough energy to fly.
2、Pterosaurs are too weighty to take off from ground.
3、Pterosaurs have a different muscle from that of birds. Their back leg muscles are too small and weak.
