In System / 38, data description specifications coded on the lines following the last field specification. Key field level specifications are permitted only for physical files or logical files.是什么意思_In System / 38, data description specifications coded on the lines following the last field specification. Key field level specifications are permitted only for physical files or logical files.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句