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water-seal英英字典_water-seal剑桥英语解释_water-seal柯林斯英文解释_94生活常识网有道词典
94生活常识网有道词典

water-seal

W 开头单词

柯林斯词典

    water seal

  • 1. N a small amount of water contained in the trap of a drain to prevent the passage of foul smells 水封

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