磁南极

司南勺由整块磁石制成。它的磁南极那一头琢成长柄，圆圆的底部是它的重心，琢得非常光滑。

The spoon was cut from an intact piece of natural loadstone , with its handle as the South Pole and s round , smooth bottom as the center ofgravity .

在地球的历史进程中地磁北极和磁南极已经转换过-一种结果就是最后的冰河时期。

The magnetic North and South poles have shifted before in the course of the planet 's history - one result being the last Ice Age . true north ( north according to the earth 's axis , not magnetic north )

我们有必要回顾一下历史上疾病的传播，从而弄清楚传染病的起因和后果。在地球的历史进程中地磁北极和磁南极已经转换过-一种结果就是最后的冰河时期。

It 's important to look at the spread of diseases throughout history to discover the causes and effects of epidemics . The magnetic North and South poles have shifted before in the course of the planet 's history - one result being the last Ice Age .