以上来源于: WordNet
This would mean that the Earth's core periodically heats up the overlying mantle, generating synchronised plumes that rise to the surface at widely separated spots.
这意 味着地核像心脏跳动一样周期性地加热其上方的地幔，产生同步的地幔柱变化影响地壳厚度。
Because of its proximity to Earth's core, the rock at the base of the mantle is much hotter than rock in the upper mantle.
由于靠近地核，地幔底部的岩石比上地幔岩石的温度高得多。
The innermost region of the Earth's outer core periodically flows faster or slower, and this action "tugs" at the planet's magnetic field, says Gillet.
地球外核最深区域呈阶段性快慢流动，这一行动“拽动”了地球磁场，吉莱说。
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