The moment that you would see their body languagechange.
你可以看到他们的身体语言立刻改变了。
2
But unlike genes, these cultural units cannot be traced back far enough to distinguish patterns of languagechange much earlier than about 6500 years ago.
但是这些文化细胞不同于基因，它们不能可以追溯到6500年以前，因而不能确定语言变化的图式。
3
As a psychologist, I brought neuroscience questions to the study, like "How does the acquisition of a second languagechange thought?"