Our cursorial dinosaur is Ornithomimus, so B is the correct answer.

我们的游标恐是似鸟，所以 B 是正确答案。

Some had cursorial limbs and others landed in the gray area in between.

有些有粗略的四，有些则落在两者之间的灰色区域。

Which of these animals do you think had cursorial limbs?

您认为以下哪些动物具有粗短的四？

This is in contrast to cursorial animals which tend to be smaller like a cat or a deer.

这与像猫或鹿这样体型较小的游走动物形成对比。

On the other hand, cursorial limbs allow an animal to run faster, but be less efficient at carrying a large mass.

另一方面，粗壮的四允许动物跑得更快，但在承载大质量时效率较低。

This is a strong factor in what drives different groups of animals to either evolve more graviportal limbs or more cursorial limbs.

这是促使不同动物群体进化出更多重力门或更多游动体的重要因素。