But in a small,short person, Skinner says,just 3 kilograms can make the difference between a healthy weight and obesity.

VOA: standard.2010.03.09

Here's the difference between normal hemoglobin and sickle hemoglobin, I can make - I can see a chemical difference, I can exploit it, how can I find it?

正常血红蛋白和镰状红细胞贫血的,血红蛋白有不同之处,我能够--我能看出有化学差异,我能去探寻差异,那么我怎么找到它呢

耶鲁公开课 - 生物医学工程探索课程节选