| 词汇 | bivvy sack |
| 释义 | bivvy sack noun [ C ] UK (US bivy sack) uk/ˈbɪv.i ˌsæk/ us/ˈbɪv.i ˌsæk/ (informal bivvy) （套在睡袋外面以增加保护的）露宿袋，露营睡袋 a thin, light cover that fits over a sleeping bag for extra protection, often used by climbers |
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