1) sea-floor spreading
洋底扩张
1.
It takes the sea-floor spreading,oceanic crust subduction,and transform fault as main active forms and mantle convection as an original dynamic.
它以洋底扩张、洋壳边缘俯冲及转换断层为主要构造活动形式,配以地幔对流为原动力,建立一套颇具魅力的板块构造机制理论,被受到广泛认同。
2) submarine
洋底
1.
The investigation on the content of gold in recent submarine poly metallic massive sulfides and land-based massive base sulfide deposits demonstra te that the submarine sedimentary-exhalation not only causes accumulations of p olymetallic massive sulfides, but also results in obviously enrichment of gold.
现代洋底多金属块状硫化物和陆上贱金属块状硫化物矿床中的含金性调查研究证实：海底沉积喷流作用不仅能形成十分重要的贱金属硫化物矿床，而且也能导致金的明显富集。
3) seabed sediment
海洋底质
1.
Production technique and methods of the seabed sediment thematic digital map;
海洋底质专题数字图的生成技术与方法
2.
Because of the complexity of sea s environment and the difficulty to gain data,the sea three-dimensional visual research always concentrates on the sea scene and the seabed terrain aspect,and the related visual research of seabed sediment should be strengthened.
海洋因其环境的复杂性和数据的难以获取性,其海洋三维可视化方面的研究多集中在海洋场景和海底地形方面,有关海洋底质的可视化研究有待加强。
4) Marine Sediment
海洋底泥
1.
Numerical Simulations of Marine Sediment Movement Affected by Water Waves;
波浪影响下海洋底泥的水动力学数值模拟
5) fondothem
洋底层
6) oceanic crust
洋底壳（地）
参考词条
补充资料：极大扩张和极小扩张
极大扩张和极小扩张
maximal and minimal extensions
极大扩张和极小扩张匡.习的司出目.公油抽lex妇心.旧;MaKcl.Ma刀‘.oe H Mll.”M田.妇oe PaC山一Pe皿朋] 一个对称算子(s笋nr贺苗c opemtor)A的极大扩张和极小扩张分别是算子牙(A的闭包，(见闭算子(cfo“月。详mtor”)和A’(A的伴随，见伴随算子(呐。int opera.tor)).A的所有闭对称扩张都出现在它们之间.极大扩张和极小扩张相等等价于A的自伴性(见自伴算子(义休.adjoint operator))，并且是自伴扩张唯一性的必要和充分条件.A.H.J’Ior朋oB，B.c.lll户、MaR撰
说明：补充资料仅用于学习参考，请勿用于其它任何用途。