Tooth hypersensitivity is a relatively common problem experienced in clinical dental practice, but the mechanisms is not very clear.
牙齿感觉过敏症临床较为常见，但发病机理尚不十分清楚。
The book describes clearly and concisely the indications and methods for all common operative and conservative procedures in dental practice.
书为在牙齿的实践过程中的全部普通操作和保守的程序清楚而简明描述迹象和方法。
A school dental service exists in theory, but in practice, there are few dentists to provide service.
理论上。学校有牙科服务；但是，实际上，仅有几个牙医能提供服务。
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