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Oh my goodness, 3D printing at this level is a monster. You can 3D print these things, but remember, you have to take these aligners, and you have to put them in bags. Sometimes, you have to treat them in some way. It's hard to explain, but it looks like the inside of a Costco in a lot of ways.
，更多细节参见易翻译
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BBC國際事務首席記者 麗斯·杜塞特（Lyse Doucet）
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