水胆，指在宝玉石中，天然形成封闭空间，内含水，气泡，固体杂质等内容。多常见于水晶、玛瑙等矿物体中
且有含水玛瑙，称为水胆玛瑙。
据检测，李先生的这块石头是“水胆水晶石”，里面的杂质因在结晶时留下的“原液”形成了“转动”效果。
Li's stone is a rock crystal of water gallbladder. The reason why the impurities can move is that the original liquid left in it before it became crystal rock has capacity to move from side to side.
传统家用饮水机中，水的加热是通过内置的热胆来完成的。
Traditional household water dispenser, water heating is accomplished through a built-in hot gallbladder.
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