| 单词 | sea-floor spreading |
| 释义 | sea-floor spreading sea-floor spread.ing AHD: [s¶“flôr” sprµd“¹ng, -fl½r”] D.J. [6si87fl%8 6spred!0, -7fl*&r]K.K. [6si7fl%r 6sprWd!0, -7flor]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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