| 词汇 | polar night | 
| 释义 | polar night  noun [ C or U ] uk/ˌpəʊ.lə ˈnaɪt/ us/ˌpoʊ.lɚ ˈnaɪt/  极夜 a night or the time in winter at places close to the North or South Pole, when the sun does not appear above the horizon | 
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