I have found it advantageous to break the import process in two steps: syntax conversion and reorganization of datastructure.
我发现将导入过程分成以下两个步骤是有利的：语法转换和数据结构的重新组织。
2
For a type conversion operator, either the operand or the return type must be of the data type of the class or structure.
对于类型转换运算符，操作数或返回类型必须是类或结构的数据类型。
3
The paper analyzes the final targets, whole structure and key technologies of system in detail, and gives design of the dataconversion component and message component.