The motion of a pendulum rocks this device so that it catches and then releases each tooth of the escape wheel, in turn allowing it to turn a precise amount.
钟摆的运动使这个装置晃动，如此一来这个装置能抓住擒纵轮的每一个齿，随后又将其释放，因而使其精确转动一段距离。
No amount of cleaning will remove the severe staining left by tetracycline or systemic disease because these pigments lie inside the tooth; you'll have to take more aggressive measures against these.
不过洗牙次数再多也不能去除由于四环素或系统性疾病导致的牙齿深度着色，因为这些色素已进入你的牙齿内部，你需要采取更加积极地措施来对付它们。
ScienceDaily (Sep. 6, 2009) - it's been a mystery: how can our teeth withstand such an enormous amount of pressure, over many years, when tooth enamel is only about as strong as glass?
科学日报(2009年9月6日)——当牙齿上的牙釉质大约只有玻璃般强硬时，我们的牙齿这么多年来是怎样经受住一个如此巨大的压力的？
To evaluate the effects of the different amount of residual tooth on the fracture resistance ability of lower premolars restored with fiber quartz-fiber post-core and full crown.
评价不同牙体剩余量对石英纤维桩复合树脂核全冠修复下颌前磨牙抗折性能的影响。
This paper introduces the operation principle, structure of four-tooth outside chip discharge set of material device and main parameter determination of cutting amount.
介绍四齿外排屑套料装置的工作原理、结构及切削用量主要参数的确定。
Because the effective compositions comprise the aspartame, the amount of the sweetener is reduced, the calorie intake index, the blood sugar index and the decayed tooth index are effectively reduced.
由于有效成份中包含了阿斯巴甜，如此减少了甜味剂的用量，有效降低热量摄取、血糖以及龋齿指数。
This procedure often requires removing a small amount of tooth structure and is the most invasive, as well as the most expensive, treatment option.
这种方法只需要去除一小部分牙体组织，在所有治疗方案中，全瓷牙是对人体最无害的，但也是最昂贵的。
This procedure often requires removing a small amount of tooth structure and is the most invasive, as well as the most expensive, treatment option.
这种方法只需要去除一小部分牙体组织，在所有治疗方案中，全瓷牙是对人体最无害的，但也是最昂贵的。
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