The proteolytic phenomenon in enamel caries has been investigated from three directions.
摘要作者从三个方面探讨牙釉质龋病变中的蛋白溶解现象。
A completed and systematic acceptation could be investigated from three directions, that is, vertical association, horizontal association and cross association.
词义的完整系统性当从词义的纵向联系、横向联系、纵横交叉联系三个方向进行探讨。
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