Pertaining to having only one area in an object program for the input /output of data associated with any one file.; 用于說(shuō)明在一個(gè)目標(biāo)程序中僅有一個(gè)區(qū)域用于對(duì)某一個(gè)文件有關(guān)的數(shù)據(jù)進(jìn)行輸入輸出操 作。