An undershot jaw is to be severely penalized.
下颚突出式咬和属于严重缺陷。
Jaws must be undershot. The incisors of the lower jaw should protrude over the upper incisors.
咬合必须是下颌突出式咬合，就是说，下颌的门牙必须比上颌的门牙向前突出一些。
Jaws must be undershot. The incisors of the lower jaw should protrude over the upper incisors.
咬合必须是下颌突出式咬合，就是说，下颌的门牙必须比上颌的门牙向前突出一些。
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