An "interbody fusion" is a bony bridge that "welds" the two vertebral bodies together to stop unstable motion.
“椎体融合术”就是将两个脊椎连接起来防止脊椎不稳定的手术。
That is able to make the longitudinal motion of airplane unstable.
这足以使飞机纵向运动发生不稳定而危及安全。
When the motion of the basic state is the shear flow (or the differential rotation), this property means that the unstable waves would evolve automatically into the quasi-stationary stage.
当基态运动为剪切流(或较差旋转)时，这一性质将使不稳定波自动演化到准稳阶段。
The response results show that there are three ways leading to chaos: quasi-periodic bifurcation, intermittent bifurcation and unstable period-3 motion.
由结果发现：响应进入混沌的道路有拟周期环面破裂、周期3运动失稳和阵发性混沌进入混沌三条。
The reason of rend and unstable running of cone lining was found through analysis of cone crusher by using the principle of dynamic and motion. The methods for solving the problems were raised.
运用动力学和运动学原理，对圆锥破碎机进行了运动和受力分析，找出了锥形衬套产生裂纹及运动不稳定的原因，并提出了解决问题的方法。
The rigid motion model is more accurate mathematical description for the unstable image sequence than the translation motion model, so the proposed method has more steady effect.
与平移运动模型相比，刚性运动模型更加符合帧间运动的真实过程，因而本方法具有更好的稳像效果。
The rigid motion model is more accurate mathematical description for unstable image sequence, so proposed method has more steady effect.
与平移运动模型相比，刚性运动模型更加符合帧间运动的真实过程，因而本方法具有更好的稳像效果。
The results show that the vortex motion is unstable for small three-dimensional disturbances in the separated wake of a circular cylinder.
结果表明，圆柱分离尾迹中的旋涡存在三维不稳定性。
The results show that the vortex motion is unstable for small three-dimensional disturbances in the separated wake of a circular cylinder.
结果表明，圆柱分离尾迹中的旋涡存在三维不稳定性。
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