And in some ways we had hooked ourselves back onto this idea: cells, organisms, environments, because we were now thinking about bone stem cells, we were thinking about arthritis in terms of a cellular disease.
从某个角度看， 我们回到了一开始的想法上： 细胞，组织，环境， 现在我们从骨干细胞的角度出发 我们开始将关节炎 当作是细胞疾病来看待。