每个磁带分配地址的符号位被用来指示是否已经分配给一个程序。
The sign bit of each tape assignment location is used to indicate tapes assigned to a program.
符号表记录了程序员声明的所有变量和函数名，以及它们在内存中的地址。
The symbol table holds all the variable and function names made up by the programmer, along with the addresses where they can be found in memory.
对于其余的程序，当处理这些项目时，程序员将引用这些符号名称而非地址。
For the remainder of the program the programmer would refer to the symbolic names rather than to the address when such items were to be processed.
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