in Nicaragua in sign language

一个精彩的手语个案研究
where they acquire sign language from adults

儿童们从本身并不熟悉手语的成年人那里
who themselves are not versed in sign language.

习得手语
They're sort of second-language learners struggling along.

他们艰难的学习着第二语言
What you might have expected would be

你可能会认为儿童会使用
the children would then use whatever system their adults use,

成人所使用的语言系统
but they don't.

但事实并非如此
They "Creolized" it.

他们将语言克利奥尔化
They take this makeshift communication system developed by adults

他们继承了成人发展出来的临时交流系统
and, again, they turn it

将这个临时交流系统
into a full-blown language,

再次发展成一种成熟的语言
suggesting that to some extent

这表明从某种程度上来说