曲面: hook face; curve; curved sur ...的: 4次方是 The fourth power of 2 i ...第一: first; primary; foremost; fi ...基本: basic; fundamental形式: form; shape; layout; modalit ...第一基本形式: first fundamental form曲面的第二基本形式: second fundamental form of a surface基本形式: basic form; citation form; dominant mode; elemental form; fundamentalform fundamental form; ground form; grundform, die; - en; primitive form第一基本量: first fundamental quantity基本型, 基本形式: fundamental form第二基本形式: second fundamental form第三基本形式: third fundamental form基本形式模式: basic formal pattern螺纹基本形式: basic form of thread; basic thread form商业基本形式: basic from of business四种基本形式: four basic forms曲面的基本型: fundamental forms of a surface乙炔发生器的基本形式: basic types of acetylene generators福利经济学第一基本定理: fundamental theorems of welfare economics基本形: primitive form资本形式: formation of capital; forms of capital第一基金: first fund第一基室: first basal cell埋弧焊焊缝坡口的基本形式和尺寸: basic forms and sizes of weld grooves for submerged arc welding叠置基本形: superposed fundamental form