There were barriers. With dedication and perseverance anyone in this country can do anything they put their mind to and there are no limits.

VOA: standard.2010.02.02

The question is, "Are there inherent limits in our abilities to come up with grammars?"

这个问题是,"我们创造语法的能力,是否存在天生的局限"

耶鲁公开课 - 心理学导论课程节选

Controversial in the sense that maybe it's not a good thing to do, or there might be some limits on what we want to do there in terms of integrating machines with people's brains.

它的争议性在于这可能并不是一件好事,在我们想往人脑中植入机械时,会不会受到某种限制

耶鲁公开课 - 生物医学工程探索课程节选