We could fit the smallest monkey, the pygmy marmoset, on here.

我们可以把最小的猴子，侏儒狨猴，放在这里。

And it seems something has caught the eye of one of the marmosets, prompting a loud warning call.

似乎有什么东西引起了其中一只狨猴的注意，它发出了一声响亮的警报。

And they followed cells deep in the brain of a marmoset over the course of a year.

在一年的时间里，他们跟踪了狨猴大脑深处的细胞。

That makes them among a few mammals— like marmosets— whose offspring utter sounds similar to babbling in babies.

这使它们成为少数哺乳动物（如狨猴）中的一种，它们的后代发出的声音类似于婴儿的牙牙学语。

From the world's smallest monkey, the pygmy marmoset weighing as little as 4 ounces to the world's largest monkey, the mandrill weighing as much as 77 pounds.

从世界上最小的猴子，只有4盎司重的侏儒狨猴到世界上最大的猴子，重达77磅的大狒狒。

Other primates, like macaques and marmosets, demonstrate similar patterns, so it's likely that gloss perception is something that developed a long time ago in our shared evolutionary history.

其他灵长类动物，比如猕猴和狨猴，也有类似的模式，所以光泽感知很可能是在我们共同的进化史上很久以前就发展出来的。

One of the hallmarks of being a hominid is having opposable thumbs: stronger, longer and more flexible than the thumbless hands of a spider monkey or the non-opposable thumbs of a marmoset.

比蜘蛛猴的无拇指或绒猴的不对生拇指更强壮、更长、更灵活。