The majority of all earthquakes and volcanoes happen along plate boundaries.

大多数地震和火山都发生在板块边界。

It's a massive tectonic plate boundary and it splits Iceland literally in half.

这是一个巨大的构造板块边界，它将冰岛一分为二。

Iceland and Japan are near active volcanoes and tectonic plate boundaries, where magma rises up through the crust.

冰岛和日本靠近活火山和构造板块边界，岩浆从地壳上升起。

Now, Iceland sits on a tectonic plate boundary between the North Atlantic and Arctic Oceans, and that plate continually splits farther apart, pushing North America and Europe farther apart.

现在，冰岛位于北大西洋和北冰洋之间的构造板块边界上，该板块不断分裂，将北美和欧洲推得越来越远。

Undersea Mountains: The Mid--Ocean Ridges Mid--ocean ridges, the longest mountain chains on Earth, are formed at divergent plate boundaries where two oceanic plates move apart.

海底山脉：大洋中脊 大洋中脊是地球上最长的山脉，形成于两个大洋板块分开的不同板块边界处。

The site of this destruction is another kind of plate boundary: a subduction zone. There one plate dives under the edge of another and is reincorporated into the mantle.

一块潜没的区域。在这里，一块板块潜没到另一板块的边缘之下并结合入地幔之中。

This heat drives the convection currents in the mantle, causing tectonic plates to move and interact, leading to the formation of volcanoes at certain plate boundaries.

这种热量驱动地幔中的对流，导致构造板块移动和相互作用，导致某些板块边界形成火山。

Deep Ocean Trenches: The Subduction Zones In contrast to mid--ocean ridges, deep ocean trenches form at convergent plate boundaries, where one plate descends, or 'subducts, ' beneath another.

深海海沟：俯冲带 与洋中脊相反，深海海沟形成于会聚板块边界处，其中一个板块下降或“俯冲”到另一个板块下方。