But before I tell you about lab experiments let me tell you about the most famous field experiment on this idea.

但是，在此之前,让我告诉你们关于这个观点最著名的现场试验。

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For example, one of the experiments we do is measure the magnetic field of current coil, and after we do the experiment, we all have a passive visualization that shows the same experimental set-up, except we add to that.

比如，我们做的一个实验就是,测量电线圈的磁场，在我们做完实验之后，我们都感受到了一个直观化的过程,它展现了同样的实验过程，只是那是我们加的。

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