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As far as we know, such a magnetic reversal doesn't cause any harm to life on Earth.
就我们所知道的,这种磁极转换不会对地球上的生命造成任何伤害。
Although magnetic reversals have occurred many times in the geologic past, it is not yet possible to predict when the next reversal will occur.
尽管在过去地质时期地磁场发生了多次倒转,但要预测下次倒转将在何时发生也还是不可能的。
They claim a relationship between the rotation and the magnetic polarity of Earth, which does change irregularly, with a magnetic reversal taking place every 400,000 years on average.
他们声称地球的自转和地球的磁极的关系不稳定,预示着平均每40万年就有一次的磁极颠倒。
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