The surface mark of an established plume is a hot spot—an isolated region of volcanoes and uplifted terrain located far from the edge of a surface plate.
一个已形成的烟羽的表面标志是一个热点——一个远离表面板块边缘的火山和隆起地形的孤立区域。
2
We also put a mark at 0, the left edge.
我们还在 0 位置 —— 左侧边缘 —— 放置了一个标记。
3
The COINS, made by the Philadelphia mint, were supposed to have the inscriptions "in God we Trust," "e Pluribus Unum," the date and the mint mark around the edge.