单词pack animal
n.: 驮畜;役畜网络: 能运输的动物;驮兽;短语
驮畜;役畜:
an animal used for carrying loads, for example a horse
重叠
驮子,驮畜
I can"t over emphasize how important that is to a pack animal.
我不用加重语气来强调这点对于群居动物的重要性。