Some magnets may have a mark to identify which surface is the northpole .
有些磁铁可能有标志(红色斑点或其他一些标志),以确定哪些表面是北极。
词典释义:
n. 北极
Some magnets may have a mark to identify which surface is the northpole .
有些磁铁可能有标志(红色斑点或其他一些标志),以确定哪些表面是北极。