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Q:前几天我把铅笔刀弄脏了,便用水清洗了一下。为了让小刀快点儿干,我把它放在火上烤了一烤,结果出现了一个有趣的现象:小刀表面泛出了蓝色的光。这是为什么呢?
Q: I stained the pencil sharpener a few days ago and washed it with water. In order to make the knife a little faster, I baked it on the fire roasted, the result appeared an interesting phenomenon: knife surface glowed blue light. Why is this?