These processes construct a complete regional tectonic cycle, or a complete geochemical cycle.

这些构成了一个完整的区域构造旋回，同时也是一个完整的地球化学旋回。

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The implication of tectonic cycle in terms of plate tectonics theory is totally different from the one in early knowledge, which laid stress on uncomformity.

板块构造理论中的构造旋回含义与早期经典的强调以不整合为基础的认识不同。

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Given all the discoveries that we have made from an up-close investigation of these ocean ridges, we can't help but wonder what we might find at the far end of the same plate tectonic cycle where seafloor is drawn back into the Earth's interior at deep-ocean trenches.

CNN: Probing the ocean's undiscovered depths