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TOEFL BNC: 6975 COCA: 7097

unstable

Related topics: Chemistry
un·sta·ble /ʌnˈsteɪbəl/ ●○○ AWL adjectiveadj  
1 CHANGE/BECOME DIFFERENTlikely to change suddenly and become worse 不稳定的,易变的,动荡不定的 instability
 The political situation is still very unstable.
政局依然非常动荡。
 an unstable relationship
不稳定的关系
2. BALANCE#something that is unstable is likely to move or fall 易动[倒下]的,不稳固的
3 CHANGE/BECOME DIFFERENTsomeone who is unstable changes very suddenly so that you do not know how they will react or behave 〔人〕反复无常的,动摇不定的
 a mentally unstable man
一名精神状态不稳定的男子
4. HCan unstable chemical is likely to separate into simpler substances 〔化学物质〕不稳定的
Examples from the Corpus
un·sta·ble adjectiveadj
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