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把一块冰从上到下切开,但切完后它却仍然是一整块,听起来很新奇是吗?其实这里面的道理很简单。你也可以动手试一试——
Cut an ice from top to bottom, but after cutting it is still a whole, it sounds very novel is it? In fact, the truth is very simple. You can also try it yourself -