Watch how to maintain is very important, so precious things, be sure to understand the attention of watch maintenancecare.
手表如何保养是非常重要的，这么珍贵的东西，一定要了解手表保养护理的注意事项。
2
Methods: 22 patients with chronic periodontitis were enrolled in a 9-month maintenancecare program after non-surgical periodontal therapy.
方法：对牙周非手术基础治疗后进入维护治疗期的22名慢性牙周炎患者进行9个月的纵向观察。
3
If, by definition, health care means "the maintenance of good health," then technology has failed miserably to produce any measurable improvement in the overall state of health of mankind.