linearly unstable motion 线性不稳定运动
unstable rack motion 不稳定的齿条运动
motion unstable 动不稳定
unstable state of motion 不稳定运动状态
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。
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