protraction
英
美
网络 前伸; 延长; 前突; 前凸; 前旋
英英释义
noun
- the act of prolonging something
- there was an indefinite prolongation of the peace talks
- the consequence of being lengthened in duration
双语例句
- Biomechanical study on 3-dimensional finite element model of simulated maxillary protraction after maxillary fissure repair
模拟修复上颌骨裂隙后前牵引受力的三维有限元生物力学研究 - Objective To evaluate the treatment effect and stability of maxillary protraction and rapid palatal expansion in the permanent dentition.
目的研究联合应用上颌前方牵引与快速扩弓对恒牙早期Ⅲ类骨性错牙合的矫治效果及稳定性。 - This question of "for whom?" is fundamental; it is a question of principle. This is exactly one of the fundamental reasons why the Taiwan issue is characterized by protraction and complexity.
为什么人的问题，是一个根本的问题，原则的问题。这正是台湾问题具有长期性、复杂性的根本原因之一。 - Design and Protraction for Oil Well Structure Drawing Based on Visual Basic
基于vb的油井结构图设计与绘制 - Conclusion vertical control was good in jaw bone and was not effective in dentition when applying maxillary protraction combined with rapid expansion.
结论联合上颌前方牵引及快速扩大方法对颌骨垂直向控制较好，但对牙齿垂直向控制较差。 - Comparison with the Effect of the Skeletal-dental and Soft Tissue Profile Changes of Maxillary Protraction with Labiolingual Appliances or Rapid Maxillary Expansion Appliances
唇舌弓式及快速扩弓式上颌前方牵引口内装置对牙颌面及软组织侧貌影响的比较 - In the fourth part, we presented the formation process of Water Animation and the basic ways of protraction of OpenGL as well as the implementation of its arithmetic steps.
在第四部分，我们介绍了水动画的制作过程，给出了我们所用工具OpenGL的基本绘制方式及其算法步骤的实现方法； - Biomechanical study on 3-dimensional finite element model of maxillary protraction and the palate expansion
上颌前牵引联合腭部扩弓的三维有限元生物力学研究 - Conclusion It is obvious that age affects the results of RME and maxillary protraction therapy.
结论年龄对于前方牵引联合快速扩弓矫治效果有较为明显的影响，矫治后上颌骨以及下颌骨的位置均与年龄有关。 - Conclusion: The orthopedic force of simulating maxillary protraction promotes the remodeling of maxillary suture and TGF-β_1 may play an important role in the remodeling of maxilla.
结论：模拟上颌前牵引矫形力促进了上颌骨缝的改建，TGF-β1在骨缝的改建中发挥了重要作用。