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你知道成年人的龋病经常发生在牙齿的哪个部位吗?如果你和我的回答是同样的“在牙表面”,那就大错特错了。专家告诉我们,成年人的龋病通常发生在牙根部。
Do you know where the caries often occur in adults? If you and my answer are the same “on the tooth,” it is grossly wrong. Experts tell us that caries in adults usually occurs in the roots.