The founders loved America, but they also understood that it was a work in progress, an unfinished enterprise that would constantly be in need of change, adjustment and repair.
缔造者们热爱美国，但是他们也清楚路要一步一步的走，建设中的事业需要不断的改变、调整、修补。
OBJECTIVE: To summarize the progress in nerve tissue engineering scaffolds or heterologous nerve grafts for repair of facial nerve defects.
目的：总结神经组织工程支架或异种神经移植在面神经缺损中的应用进展。
Cementoblast plays important roles in the progress of root resorption and repair.
成牙骨质细胞在牙根修复过程中具有重要的意义。
Cementoblast plays important roles in the progress of root resorption and repair.
成牙骨质细胞在牙根修复过程中具有重要的意义。
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