目的研究颈段椎管侧隐窝正常结构形态与CT、MR的异常征像，提高对神经根型颈椎病的诊断准确率。
Objective to study the normal structure and the abnormal manifestations of vertebral lateral recess by ct and MR in order to improve the accuracy of diagnosing nerve root's cervical spondylopathy.
利用断面物理模型试验，对3种结构形式(斜坡段、大台阶段、圆筒段)的护岸的稳定性和越浪量进行了研究。
The stability and wave overtopping rate of 3 kinds of revetments (sloping, big step and cylindrical structure types) are studied by using sectional model test.
二分句段是汉语话语的最基本结构形式。
The two-clause utterance is the basic structural form in the discourse of Chinese language.
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