Aloe contains ten vitamins, including an uncommon, plant derived source of B 12, also know as cobalamin.芦荟含有十种维生素, 包括一种稀罕的 、 从植物中提炼出来的B12维生素源头, 叫做氰钴胺素....
We now omit the prime on the matrix elements.我们现在把各矩阵元素上的一撇略去.The matrix is defined as the reciprocal of A.该矩阵定义为A之逆矩阵.Local deviations depend strongly on the local geometry of the solid matrix.局部偏离严格地依赖于固体矩阵的局部几何形状....