它之所以看起来不爽是因为它反颌，皱纹和深色的肤色。
He just looks grumpy because of his underbite, wrinkles, and dark complexion.
展示了牙齿拥挤、反颌、前突、开颌等异常情况。牙齿可以自由排列。
Shows the crowded teeth, anti-jaw, protrusion, jaw opening and other anomalies. Free arrangement of teeth.
展示了牙齿拥挤、反颌、前突、开颌等异常情况和矫治的方法。 使用的是普通托槽。
Shows the crowded teeth, anti-jaw, protrusion, jaw opening and other anomalies and treatment methods.
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