不过，如果一种动物无需咀嚼的话，那么它就不需要一个很大的头部了。

But a large head would not be needed if it did not chew.

youdao

这是一个原始人吃食草动物和强硬，难以咀嚼，植物。

This hominid was a herbivore and ate tough, hard to chew, plants.

youdao

这是一个原始人吃食草动物和强硬，难以咀嚼，植物。

This hominid was a herbivore and ate tough, hard to chew, plants.

youdao