这个抽象的方面，叫做Trace，有几种标准程序来打印关于输入和退出一个程序，或构造方法的信息以及格式化输出的结果。

This abstract aspect, called Trace, has several standard methods for printing messages about entering and exiting a method or constructor, and for formatting the output.

youdao

这个抽象的方面，叫做Trace，有几种标准程序来打印关于输入和退出一个程序，或构造方法的信息以及格式化输出的结果。

This abstract aspect, called Trace, has several standard methods for printing messages about entering and exiting a method or constructor, and for formatting the output.

youdao