And they actually randomized these women who had knee osteoarthritis into one of two groups.

戴维斯：他们实际上将这些患有膝骨关节炎的女性随机分为两组。

To dig up this dirt on potatoes, the researchers actually piggybacked on another, totally unrelated study about knee osteoarthritis called the Osteoarthritis Initiative.

为了挖掘土豆上的污垢，研究人员实际上借助了另一项与膝骨关节炎完全无关的研究，称为骨关节炎倡议。