| 释义 |
sea-floor spread·ing AHD[sēʹflôr' sprĕdʹĭng, -flōr'] D.J.[ˈsiːˌflɔː ˈspredɪŋ, -ˌfləʊr]K.K.[ˈsiˌflɔr ˈsprɛdɪŋ, -ˌflor]n.（名词）- In the theory of plate tectonics, the process by which the sea floor is being continuously formed and spread by upwellings from the earth's mantle along the mid-ocean ridges when crustal plates move apart.海底扩张学说：在地壳构造学理论中，指地壳分开，内部物质沿海洋中部的裂隙从地幔中上涌，从而形成和扩大海底的过程
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