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1·Many oceanic islands are volcanic.

很多海洋岛屿是火山岛。《柯林斯英汉双解大词典》

2·There are three basic processes that cause a change in oceanic salinity.

导致海洋盐度变化有三个基本过程。

3·Soon layer of oceanic ooze began to accumulate above the old hard layer.

很快，海洋软泥层开始在原先的硬地层上面堆积起来。

4·To serve as responsible stewards of the planet, we must press forward on deeper atmospheric and oceanic research.

为了成为地球上有责任心的一员，我们必须推进对大气和海洋更深入的研究。

5·Most oceanic islands are similar to one another in latitude and contain plants and animals typical of tropical islands.

大多数海洋岛屿彼此都纬度相近，并且都有热带岛屿典型的动植物。

6·The oceanic plate is made of denser and heavier rock, so it begins to sink down under the continental plate and into the mantle.

海洋板块是由密度更大、更重的岩石构成的，所以它开始下沉到大陆板块之下，到地幔之中。

7·The oceanic volcanic islands and their hot-spot trails are thus especially useful for geologists because they record the past locations of the plate over a fixed source.

海洋火山岛和它们的热点轨迹对于地质学家尤其有用，因为它们记录了过去的板块在固定地点之上的位置。

8·If that happens, slab pull could draw the oceanic crust under the continent, actually causing the Americas to move eastward toward Europe and the ocean floor to get smaller.

若果真如此，岩板拉力会将海洋地壳拖拽到大陆之下，实际上会使美洲大陆向东移动靠近欧洲，海床也会缩小。

9·This idea was modified in the late twentieth century, when geologists and oceanographers examining oceanic sediment found fossil evidence of warming and cooling of the oceans.

在20世纪后期，地质学家和海洋学家在研究海洋沉积物时发现了能够证明海洋变暖和变冷的化石，并修正了这一观点。

10·So we have been fairly thorough in our discussion about coral reefs, which of course are prominent, oceanic features made of hard limestone skeletons produced by tiny coral animals.

我们对珊瑚礁的讨论已经相当深入了；显然，珊瑚礁具有显著的海洋特征，由小型珊瑚动物制造的石灰骨架构成。

(1)oceanic crust海洋地壳，大洋地壳

(1)oceanic island[地质学]海洋岛；大洋岛；海洋中孤岛