The functions matrix , array , and dim are simply convenience functions for setting the dimensions of a vector.

函数matrix 、array和dim是用于设置向量的维的简单函数。

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In the matrix, each row specifies a test case and each column is a parameter setting.

在矩阵中，每一行确定了一个测试用例，而每一列则代表一个参数。

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The differentiations of cell require stable extracellular setting, intercellular communication and intracellular matrix, which jointly ensure the specific spatial structure of chromosomes in cells.

细胞分化状态的维持需要细胞外环境、细胞与细胞之间信息交流及其细胞内环境等共同作用，从而保证分化细胞染色体的特定空间结构。

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