The three lowest orders of mammals, namely, marsupials, edentata, and rodents, co-exist in South America in the same region with numerous monkeys, and probably interfere little with each other.

三种最低级的哺乳动物， 即有袋动物、有齿动物和啮齿动物，在南美洲与众多的猴子共存于同一地区， 并且可能很少相互干扰。