单词：unmagnetized
音标：[ʌn'mæ^nitaizd] ；
[计] 未磁化的
单词：unmagnetized 相关文章
By calculating how old the rocks are where we find these ancient compasses, we can figure out how long ago the magnetized parts were locked in. That tells us which direction was magnetic north tens of thousands of years ago. Surprisingly, its not alw
发表于:2019-02-23 / 阅读(74) / 评论(0)
英语时差8，16
英语时差8，16