lithospheric

A mid-ocean ridge is a boundary between plates where new lithospheric material is injected from below..一道中海脊是板块之间的边界，在那里新的岩石圈的物质从下部注入。

A mid-ocean ridge is a boundary between plates where new lithospheric material is injected from belows..一道中海脊是板块之间的边界，在那里新的岩石圈的物质从下部注入。

Since the size of the Earth is essentially constant, new lithosphere can be created at the mid-ocean ridges only if an equal amount of lithospheric material is consumed elsewhere..因为地球的大小本质上是不变的，只有同等数量的岩石圈物质在其它地方被吞没，新的岩石圈才能生成。