Methods: By reference to the right-handed coordinate system, the three-dimensional positions of the femoral and pelvic attachment of the muscles related to the hip joint were all measured.
方法：以股骨头、髋臼的中心为原点建立股骨及骨盆的右手正交坐标系，将髋关节周围起于骨盆的肌肉的股骨、骨盆附着点的三维坐标位置进行了测量定位。
Objective To evaluate the diagnostic value of two-dimensional ultrasound in fetus digestive system deformity and provide reference for the correct diagnosis of fetus digestive system deformity.
目的探讨二维超声对胎儿消化系统畸形的诊断价值，为正确诊断胎儿消化系统畸形提供参考。
Kinematic equation of one-dimensional isoentropic nonsteady air was used to calculate system parameters for reference of design and experiment.
文中利用一维等熵非定常气体的运动方程计算系统的各参数，并把所得参数作为设计和试验的参考数据。
We believe the goal system of these two dimensional angels can play a certain guiding and reference part for effective operation of the oral teaching in senior school.
我们相信，这两个维度的目标体系会对高中阶段口语教学的有效实施起到一定的指导和借鉴作用。
We believe the goal system of these two dimensional angels can play a certain guiding and reference part for effective operation of the oral teaching in senior school.
我们相信，这两个维度的目标体系会对高中阶段口语教学的有效实施起到一定的指导和借鉴作用。
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