unstable
[ʌn'steɪ.bl] adjective
■not solid and firm and therefore not strong, safe or likely to last 不稳固的；不牢靠的；不安全的•That chair looks a bit unstable to me.那张椅子在我看来有点儿不结实。 •It is a poor and politically unstable society.这是一个贫穷落后且政局不稳的社会。 ■describes someone who suffers from sudden and extreme changes in their mental and emotional state （情绪）反复无常的，不稳定的•emotionally unstable情绪上反复无常 |