compacted surface造句
例句与造句
- The soils in the region were characterized by thin layer , weak structure , gravel / fragmental composition , compacted surface and drought , etc . soil water properties are important factors affecting vegetative rehabilitation in spite of low soil organic content and lack in soil nutrients
干热河谷的土壤特征表现为土层浅薄、土壤结构差、土壤石质粗骨性强或表土紧实、土壤干旱等。虽然土壤有机质含量低、有效养分也较缺乏，但是土壤水分性质是植被生长恢复的关键制约因素。 - In the second part , we investigate the compact submanifolds m with the parallel isoperimetric section in the real space forms rm ( c ) and prove that if there exists a parallel isoperimetric section on m , and the sectional curvature of m is always greater than zero , then m is contained in a hyper - sphere ; and get that the gauss curvature of the compact surfaces m with constant mean curvature in constant curvature space r4 ( c ) is always greater than zero , then m is a totally geodesic surface or a sphere , where an isoperimetric on m means a unit normal vector field defined globally on m with m1 ( ) = constant
( 2 )研究了实空间形式r ~ m ( c )中具有平行等参截面的紧致子流形m ，证明了具有一平行等参截面的子流形m ，如果m的截面曲率恒正，则m包含在r ~ m ( c )的一个超球面内；对于常曲率空间及r ~ 4 ( c )中具有常平均曲率的紧致曲面m ，如果m的高斯曲率处处大于零，则m或为r ~ m ( c )中的全测地曲面或为一球面。这里m上的等参截面是m上整体定义的单位法向量场，使得m关于它的平均曲率m _ 1 ( )是常数。 - The study on the core - shell particles shows , one extrenity of silane coupling agents at the surface of the composite particles after adding aps are connected with the fe particles . and the other extrenity outside can polymerize with the active silica . the slick and compact surface of the composite particles shows the obvious core - shell structure . the surface of the composite particles are composed of the combined apex of the element si , o , c , h . the element o is superfluous to the element si
对纳米复合铁粒子研究表明，在aps改性的铁纳米粒子表面硅烷偶联剂氨基一端连接铁粒子，另一端对铁粒子外面，能与活性硅聚合。铁纳米复合粒子颗粒表面光滑致密。核壳复合粒子表面主要由si ， o组成，伴随着微量的c ， h元素的峰，核壳复合粒子表面氧对硅有富余。 - It's difficult to find compacted surface in a sentence. 用compacted surface造句挺难的