“牙周炎”的概念、定义、翻译、参考文献-科学参考

单词	牙周炎
释义	牙周炎 Encyclopedia 医学牙周炎释 periodontitis牙周炎一组临床表现为慢性炎症和牙周组织破坏的疾病。它们都是感染性疾病，有些人长期带菌却不发病，而另一些人却发生牙龈炎或牙周炎。
随便看	approximating sequence approximating set approximation approximation accuracy approximation algorithm approximation boundary condition approximation by continued approximation by continued fractions approximation by convex sets approximation by defect approximation by diffusion approximation by excess approximation by function of complex variable approximation by interpolation approximation by least squares approximation by linear operators approximation by operators approximation by periodic transformations approximation by polynomials approximation by rational functions approximation by series approximation by splines approximation error approximation formula approximation function

科学参考收录了854744条科技类词条，基本涵盖了常见科技类参考文献及英语词汇的翻译，是科学学习和研究的有利工具。