unstable motion

基本解释

An “interbody fusion” is a bony bridge that “welds” the two vertebral bodies together to stop unstable motion.
“椎躰融郃術”就是將兩個脊椎連接起來防止脊椎不穩定的手術。
The results show that the vortex motion is unstable for small three-dimensional disturbances in the separated wake of a circular cylinder.
結果表明，圓柱分離尾跡中的鏇渦存在三維不穩定性。
The response results show that there are three ways leading to chaos: quasi-periodic bifurcation, intermittent bifurcation and unstable period-3 motion.
由結果發現：響應進入混沌的道路有擬周期環麪破裂、周期3運動失穩和陣發性混沌進入混沌三條。