In chapter 1 , we introduce all the basic ingredients of c - c spaces and their special cases : sub - riemannian groups and heisenberg groups 第一章为以后的需要我们引入c - c空间和其特殊情形:次riemann群和heisenberg群。
In a raid a year ago on the facility on indonesia ' s main island of java , police found large stores of a drug known as ecstasy , and the basic ingredients for its manufacture 一年前,印尼警方在爪哇岛上突袭这个设施,发现了大量被称为摇头丸的毒品以及制造该毒品所需的基本材料。
In a raid a year ago on the facility on indonesia ' s main island of java , police found large stores of a drug known as ecstacy , and the basic ingredients for its manufacture 一年前,印尼警方在爪哇岛上突袭这个设施,发现了大量被称为摇头丸的毒品以及制造该毒品所需的基本材料。
In a raid a year ago on the facility on indonesia ' s main island of java , police found large stores of a drug known as ecstacy , and the basic ingredients for its manufacture 一年前,印尼警方在爪哇岛上突袭这个设施,发现了大量被称为摇头丸的毒品以及制造该毒品所需的基本材料。
High purity gallium metal is the basic ingredient for semiconductor compound material , and it is also highly utilized in the manufacture of super conductor material , alloy , alnico etc 高纯度金属镓是生产化合物半导体材料的基础材料,同时它还可以用于生产超导材料、合金材料、永磁材料等。