大家在查：永磁体等离子发动机太阳电磁辐射磁南极磁北极电子壳层太阳内部铁磁质洋底磁异常条带磁极倒转

磁极颠倒

磁极颠倒

磁极颠倒

磁极颠倒

1

One of these polarity flip-flops, known to have occurred 4 . 18 million years ago , left its mark in sediments in the CAC.

这种磁极颠倒在 418万年前曾发生过一次，CAC 地区的沉积物中就留下了这次颠倒发生过的痕迹。

2

Number five, one of my favorites : Reversal of the earth 's magnetic field .

第5点，也是我最喜爱的话题之一：地球磁极颠倒。

3

Oh , by the way , we're overdue -- it's been 780 , 000 years since this happened .

噢，顺便提一下，磁极颠倒已经大大推迟了 ——上次磁极颠倒的时间是 78万年前。

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