It describes ONLF casualties as 'minimal',but gives no details.

VOA: standard.2009.11.16

Again, I'm just trying to highlight things you already know a little bit about, the book describes the details.

这里我也只是,强调一些你可能已略知一二的知识,你们教材里面有相关的细节

耶鲁公开课 - 生物医学工程探索课程节选