“An identifier's linkage determines for a multi-source-file program(a topic we will begin investigating in Chapter 6) whether an identifier is known only in the current source file or in any source file with proper declarations.
“An identifier's linkage determines for a multi-source-file program(a topic we will begin investigating in Chapter 6) whether an identifier is known only in the current source file or in any source file with proper declarations.
这句话应该译为：“标识符的连接确定了：在包含多个源文件的程序中（第6章将会讨论这个问题），标识符是仅仅在当前源文件中可知还是在任何一个正确声明了它的源文件中均可知。”