水囊，汉语词汇，指的是古代城防消防器材。“以猪牛胞盛水。设若积薪城下，顺风发火，则以囊掷火中,古军法作油囊亦便。”这里所说的油囊，既然是用来救火，当是盛的不易燃烧的油。水囊也是古代出行途中用来装水的容器，多用猪、牛、羊皮或膀胱制作。
质感像软葡萄或水囊，但有时囊肿感觉发硬。
In texture, a breast cyst usually feels like a soft grape or a water-filled balloon, but sometimes a breast cyst feels firm.
细胞就是个水囊。
他在水囊里四处跳跃，但一段时间之内你不会感觉到任何迹象。
He's bouncing around inside his watery sac but you won't feel anything for quite awhile yet.
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