And it turns out the big determinant of how well you speak English as an immigrant isn't how smart you are.

作为移民,你的英语口语究竟有多么流利,最大的决定因素并非你有多么聪明

耶鲁公开课 - 心理学导论课程节选

But I never knew too much, and my... they don't really speak English that well,

但我知道的不多，而且我的。。。实际上他们的英语并不是很好。

学习外语的原因 - SpeakingMax英语口语达人