Excessive mesial-axial inclination of the mandibular second molar or inadequate posterior arch length cause the mandibular second molar to become impacted against the distal contour of the first permanent molar.是什么意思_Excessive mesial-axial inclination of the mandibular second molar or inadequate posterior arch length cause the mandibular second molar to become impacted against the distal contour of the first permanent molar.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句