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| ADJ |
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| /ʌnˈsteɪbl/ |
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| 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。 |
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| 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 |
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| 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 |
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| 4 | science an unstable substance can suddenly change and become dangerous （物质）不稳定的 |
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