I unwrapped a lump of suger and put it in my coffee.The sugar didn't get wet.Why?

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I unwrapped a lump of suger and put it in my coffee.The sugar didn't get wet.Why?

I unwrapped a lump of suger and put it in my coffee.The sugar didn't get wet.Why?
I unwrapped a lump of suger and put it in my coffee.The sugar didn't get wet.Why?

I unwrapped a lump of suger and put it in my coffee.The sugar didn't get wet.Why?
我解开一包糖,放进咖啡中.糖没有湿,为什么?

我拆开一块糖,把它放咖啡里,糖没溶解,为啥啊