热点和它们的火山痕迹是标志板块移动的里程碑。
The hot spots and their volcanic trails are milestones that mark the passage of the plates.
在山麓小丘之下，我瞥见了一两个坟头，坟头已经裂开，样子与火山口相仿——也许，它是部落首领的埋葬之地，或者就是某个迷失的游牧开拓者的一座里程碑。
Once or twice under the foothills I glimpsed the mound of a kurgan, broken open like the lips of a volcano – the burial-place of a tribal chief, perhaps, or the milestone of some lost nomad advance.
在山麓小丘之下，我瞥见了一两个坟头，坟头已经裂开，样子与火山口相仿——也许，它是部落首领的埋葬之地，或者就是某个迷失的游牧开拓者的一座里程碑。
Once or twice under the foothills I glimpsed the mound of a kurgan broken open like the lips of a volcano? The burial-place of a tribal chief perhaps or the milestone of some lost nomad advance.
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