More than a century after its discovery, Alzheimer's disease is still destroying people's brains.

VOA: special.2009.09.15

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

Researchers discovered that people whose brains have higher levels of leptin are less likely to suffer from Alzheimer's or other forms of dementia.

VOA: standard.2009.12.30

"All our brains shrink a little as we grow older, but in some people it shrinks more and some it shrinks less,"

VOA: standard.2009.12.30