But at a time when the American factory seems to be a shrinking presence, and when good manufacturing jobs have vanished, perhaps never to return, there is something deeply troubling about this dilution of American craftsmanship.
出自-2013年6月阅读原文
柯林斯高阶英汉双解学习词典释义
N-COUNT
稀释物;冲淡物
A dilution is a liquid that has been diluted with water or another liquid, so that it becomes weaker.