暖壶正是利用热量的散发分为传导、对流、和辐射这三者的原理。暖壶的瓶塞是用软木做的，而软木不易导热，尽量防止了传导的发生；暖壶中间是真空，尽量防止空气对流的发生；还有暖壶的瓶胆镀成银白色，可以使热量反射到瓶内而不辐射出去。
... 闹铃时钟 alarm clock 暖壶 thermos flask; vacuum flask 喷壶 spray bottle; watering can ...
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暖壶必须提前备好开水。
他从小就开始在苏格兰中部的黑水晶山脉（凯恩戈姆山脉）滑雪，甚至记得曾将一暖壶雪带回家作为纪念。
He began skiing as a child in the Cairngorm mountains, in central Scotland, and even remembers taking home a Thermos flask of snow as a souvenir.
一位妇女回到家中，发现她的丈夫在厨房里疯狂地摇晃着，他的腰间貌似有根电线连着电暖壶。
A woman came home to find her husband in the kitchen, shaking frantically with what looked like a wire running from his waist towards the electrical kettle.
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