very uncertain ; highly unstable
非常不稳定的 roller coaster
非定常流不稳定流 unsteady flow
非定常不稳定流动 unsteady and unstable flow
结果是，进化树的结构变得非常不稳定而且能转变。
As a result, the structure of that evolutionary tree is very unstable and can flip around.
youdao
在那里，非常不稳定。
It's there, it's very unstable.
我在一个非常不稳定的气氛中长大，这使我也变得不稳定。
I had grown up in a very unstable atmosphere, which made me unstable.
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