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1·He took these cells and injected them back in to the ear into the otic vesicle.

他提取出这些细胞，然后注射到耳部泡囊中。

2·One experiment a post doc of mine did was he took these cells and injected them back in to the ear into the otic vesicle at the stage where we think the cells are in development.

我的一位博士后做了一个实验，他提取出这些细胞，然后注射到，处于发育阶段的，耳部泡囊中。