unstable /ˌʌnˈsteɪbəl/ adjective Learner's definition of UNSTABLE
[more unstable; most unstable]
: not stable不稳定的: such as
a : likely to change易变的 -
unstable prices不稳定的价格
-
unstable weather多变的天气
b : not emotionally or mentally healthy（情绪或精神）不稳定的 c : not held in a secure position : likely to move or fall易移动的；易倒下的；不稳固的 d technical : having a chemical structure or physical state that changes easily（化学结构或物理状态）不稳定的