Over the past few decades, the magnetic field has weakened rapidly enough to flip within a few thousand years, but this could also be part of a more limited variation.
在过去的几十年里，磁场极速减弱，导致逆转会在几千年内发生，但这也可能只是前奏的一小部分。
Over the past few decades, the magnetic field has weakened rapidly enough to flip within a few thousand years, but this could also be part of a more limited variation.
在过去的几十年里，磁场极速减弱，导致逆转会在几千年内发生，但这也可能只是前奏的一小部分。
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