1·Now it is regarded as just about as cosmetic, and as non-essential, as birth control or orthodontics.
现在它几乎是仅用作表面的或非必须的，作为出生控制或牙齿矫正。
2·The system is divided into several modules, which is realized separately by using object-oriented programming ideas. Finally, all modules will be combined to form an overall orthodontics system.
系统分为若干功能模块，各功能模块分开实现，有机结合形成一个整体的牙齿矫正系统。