What is the defect of the structure of the tooth(teeth)?

什么是牙齿结构上的缺陷呢？

youdao

The defect of knowledge structure.

知识结构缺陷；

youdao

The parent phase contains the defect structure.

该母相含有该缺陷结构。

youdao

The parent phase contains the defect structure.

该母相含有该缺陷结构。

youdao