sea-floor spreading rate海底扩张速度
sea-floor spreading center海底扩张中心
sea-floor r spreading海床扩展;海底扩张
sea-floor spreading hypothesis海底扩张说
pulse of sea-floor spreading海底扩张的脉动
TIDAL MODEL OF SEA-FLOOR SPREADING海底扩张的潮汐模式
Plate Tectonics and Sea-floor Spreading板块结构与海床扩展;板块构造和海底扩张;板块构造学;板块结
N（名词） a series of processes in which new oceanic lithosphere is created at oceanic ridges, spreads away from the ridges, and returns to the earth's interior along subduction zones 海底扩大说 (Also called ocean floor spreading)