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TOEFL BNC: 6975 COCA: 7097
unstable
adjective /ʌnˈsteɪb(ə)l/
  1. 1
    an unstable person becomes angry or upset often and very suddenly (情绪)多变的,反复无常的

    My father wasn't a bad man, but he was emotionally unstable. 我父亲人不坏,只是情绪反复无常。

     Synonyms and related words
  2. 2
    an unstable government changes often and must deal with a lot of fighting and protests (政局)不稳定的,动荡的
     Synonyms and related words
    Words used to describe systems and types of government: absolute, absolutist, autonomous...
  3. 3
    an unstable system, situation, or relationship often has serious problems (体制、情况或关系)不稳定的,常出问题的

    an unstable economy 不稳定经济

  4. 4
    chemistry an unstable substance reacts very easily with other chemical substances and can be dangerous (物质)不稳定的
     Synonyms and related words
    Describing chemicals and chemical processes: active, aerobic, alkaline...
  5. 5
    chemistry relating to a radioactive substance whose nucleus breaks down to release radioactivity
     Synonyms and related words
  6. 6
    physics an unstable object is likely to move or change because of the forces affecting it
     Synonyms and related words
    Not reliable or trustworthy: official, unreliable, suspect...
TOEFL BNC: 6975 COCA: 7097
unstable

adjective¹

1likely to change suddenly; likely to move or fall不穩定;易動;易倒VERBS | ADVERB VERBSappear, be, seem顯得不穩定;易變;好像不穩定become變得不穩定remain一直不穩定make sth, render sth使⋯不穩定Prison order is rendered unstable by young inmates serving short sentences.刑期短的少年犯造成監獄秩序混亂。ADVERBextremely, fairly, very, etc.極其/相當/非常不穩定highly極不穩定increasingly越來越不穩定relatively相當多變inherently本質上不穩定potentially潛在地不穩定notoriously眾所周知地難以預測The building trade is notoriously unstable.建築行業是出了名地變幻莫測。dangerously有坍塌危險economically, financially, politically經濟不穩;金融動盪;政局不穩定a politically unstable region政治動盪的地區
unstable

adjective²

2not mentally normal情緒不穩VERBS | ADVERB VERBSbe, seem情緒波動;好像情緒不穩定become情緒開始波動ADVERBextremely, fairly, very, etc.極其/相當/非常不平靜highly很不平靜emotionally, mentally, psychologically情緒不穩定;精神狀態不穩定vulnerable, emotionally unstable individuals敏感、情緒不穩定的人
TOEFL BNC: 6975 COCA: 7097
unstable adj.
mentally ill (emotionally unstable) uncertain (an unstable situation)

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