An expert problem solver must be endowed with two incompatible qualities -- a restless imagination and a patient pertinacity.

解题高手必然兼具两种看来很不协调的：动的想像力与稳定的毅力。

It will cause loss of the canine guidance, damage of the occlusion, and discoordination of the maxillary and mandibular arch forms.

阻生犬齿引起犬齿导引的失、咬合的损伤、上下颚牙弓的不协调。