unstable
adj
1 likely to move or fall; not firm 很可能移动或跌落的; 不稳的; 不坚固的
an unstable load, eg on a lorry 装得不稳的货物(如卡车上的)
an unstable pile of chairs 一堆放得不牢靠的椅子.
2 likely to change suddenly; unpredictable 很可能突然改变的; 难以预料的
unstable share prices 变化莫测的股票价格
The political situation is highly unstable.政局动荡得很厉害.
3 mentally or emotionally unbalanced(精神或情绪)不平衡的, 波动的
His personality is a little unstable. 他这个人有点反覆无常.