principal data

• 基本数据

principal data的用法和样例：

例句

1. They are not well-suited for underlying data sets that are frequently updated.
   但它们不太适于经常更新的基本数据集。
2. This will be the base data type that this simple type will be derived from.
   它是将导出该简单类型的基本数据类型。