But the core isn't perfectly insulated, so heat constantly leaks, escaping to the surrounding mantle and driving plate tectonics and magmatic activity.
但是核心并没有完全绝缘，所以热量不断泄漏， 逃逸到周围的地幔， 驱动板块构造和岩浆活动。
Magmatic activity
原声例句
TED-Ed（视频版）
英语百科
Magmatic activity
In geology magmatic activity or igneous activity is the production, intrusion and extrusion of magma or lava. Evidence for magmatic activity is usually found in the form of igneous rocks – rocks that have formed from magma.
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