Optical disk holds much more, data than many magnetic disks.

光盘能够存储比磁盘多得多的数据。

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Finally, a weak magnetic field fiber optical sensor is set up.

最后，搭建了微弱磁场探测实验系统。

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Finally, a weak magnetic field fiber optical sensor is set up.

最后，搭建了微弱磁场探测实验系统。

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