plate boundary

基本解释

The site of this destruction is another kind of plate boundary: a subduction zone.
销毁旧岩石圈的地方形成另外一种板块边界：一块潜没的区域。
Mantle material can sink at a plate boundary, and then flow back upward farther away, pushing on the crust — a process called small scale convection.
地幔，这种物质可以在板块边界处下沉，然后向上回流到较远的地方，再与地壳相碰撞——这个过程被称为小规模的对流。
Both kinds of plate boundary are associated with fault systems, earthquakes and volcanism, but the kinds of geologic activity observed at the two boundaries are quite different.
两种板块边界均与地层系统、地震以及火山活动有关，但在两种边界处观察到的诸般地质活动却迥然不同。

Instead of occurring at a plate boundary along an area called a subduction zone, where one tectonic plate is diving beneath another, this earthquake occurred in the middle of an oceanic plate, where the faults in the crust essentially moved from side to side instead of up and down.
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