这意味着天空可以被分割开来，比远离赤道的地方要对称得多。
What that meant was that the sky could be partitioned, divided up, much more symmetrically than it could farther away from the equator.
由于地磁位型的不同，发生率的分布并不具有经度对称性，即使在磁赤道附近也如此。
Due to the magnetic effects, the occurrence rate of the instability is not symmetric in longitudes even at the magnetic equator.
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