Okay so now I am going to bring the apple up there's some metal here, there are electromagnets and so I throw a switch here so that the electromagnet is activated.
好，我现在挂苹果了啊，一部分是铁，还有磁铁，我把开关开开，磁铁启动了。
Okay so now I am going to bring the apple up there's some metal here, there are electromagnets and so I throw a switch here so that the electromagnet is activated.
好，我现在挂苹果了啊，一部分是铁，还有磁铁，我把开关开开，磁铁启动了。
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