Knocking a nail into your fridge? Are you crazy? Don't worry. This is just trickery. The magnetic can help you "drive" in nails.
什么？把钉子钉在冰箱上？你没有搞错吧，这怎么可能？其实这是磁性按钉，有了它您就可以把便签钉在任何的金属物体上。
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Nails on a Blackboard Drive Us Crazy!
前一篇指甲划黑板，惹人生厌！
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