Chinese scientists used a 3-D printer to make a (donor, tissue, or framework) for each new ear. Then they added cells from the c
hild who would receive the war. These cells grew in number until they (damaged, energized, or replaced) the printed part of the ear. After (many years, several months, a few days), the ear was ready. This whole process was (less healthy, still easier, much faster) than getting a donor.
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