实际上,大多数规范是有缺陷的——直到您根据该规范实现并测试之后才能知道如何缺损的。
In reality, most specifications are flawed — you do not know how flawed until you have implemented and tested according to the specification.
颌面部缺损不仅造成生理功能的缺陷和丧失,而且因容貌的损坏给患者造成严重的心理创伤,甚至使其丧失生活信心。
Maxillofacial defects not only cause physiological malfunction but also cause psychological hurt heavily to patients. They even lose confidence for life because of damaged functions and appearance.
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