Now, if the current is sent one way through the read/write head the area is polarized in one direction.

如果当前通过读写头来发送指向一个方向的信息,这个区域的磁极指向某个方向。

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That's what this arrow at the right shows, the direction of the flow of information.

这就是右边这个箭头的含义,即信息流动的方向

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