搜索结果: 1-1 共查到“电磁场理论 once thought”相关记录1条 . 查询时间(0.062 秒)
Earth's last magnetic field reversal took far longer than once thought（图）
Earth magnetic field reversal took longer once thought
font style='font-size:12px;'>
2019/10/21
Earth's magnetic field seems steady and true -- reliable enough to navigate by. Yet, largely hidden from daily life, the field drifts, waxes and wanes.The magnetic North Pole is currently shifting tow...