Publisher Simon and Schuster says it has sold two hundred million copies of Nancy Drew books in twenty-five languages around the world.

VOA: special.2009.08.24

There's a region up here called the antigen binding region and those-- and there's two copies of that region and it's responsible for antigen binding.

在图片上部有个区域,被称作抗原结合区,而这些,而这里有两个抗原结合区,主要负责与抗原结合

耶鲁公开课 - 生物医学工程探索课程节选