你把水壶放在炉子上了吗？
我总是把水壶带在身上，放在我的午餐袋子里，然后出门都随身带着，而且我这样使用也有段日子了。
I always put them in my lunch bag and take them with me and they are already charging my water and food for the day.
把用热器放在锅、水壶等）放在焦斑处，就可以得到较大的太阳辐射能流密度，也就是说，在单位面积上可以得到较高的太阳辐射功率。
When the heater is placed in the pot, kettle, etc. , it is placed in the focal spot, and the larger solar radiant energy density can be obtained.
把用热器放在锅、水壶等）放在焦斑处，就可以得到较大的太阳辐射能流密度，也就是说，在单位面积上可以得到较高的太阳辐射功率。
When the heater is placed in the pot, kettle, etc. , it is placed in the focal spot, and the larger solar radiant energy density can be obtained.
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