1. The absence of oral maxillofacial region is the common clinical problem. There are so many questions to restitute the absence in traditional ways and the effect is not satisfied. 口腔颌面部缺损是临床常见问题，采用传统的方法进行整复存在诸多问题，效果不尽如人意，科学家逐渐将目光转向异体组织移植。
2. If Carter in the absence of the injured on the ground game, and there is no relationship, and his absence will be for other players to stay more. 如果卡特以伤病为理由缺席比赛，也没有什么关系，他的缺阵会为其他球员留出更多的机会。
3. There is no make-up classes provided for the absence of optional classes, meanwhile, it will be noted as absence. 选修课程的缺席时数不得要求补课，并登记为缺席纪录。
4. How long were your absence(leave, depart from, be off, travel tour trip journey peregrinate) from USA?Why? 你离开（旅行） 美国有多长时间？
5. How long were your absence(leave, depart from, be off, travel tour trip journey peregrinate) from Canada?Why? 你离开（旅行）加拿大有多长时间？
网络释义
take a leave of absence 留职停薪;
Leave of Absence （准假）：准许学习成绩优良的学生请假一段时间，然后继续学业。;
请假;
休假;
获准的假期;
