rubout key造句

• Though having changed little in effect over the decades, editing has changed enormously in feeling : only one line of the program was'displayed'at a time ( physically printing it out on the paper ); inserted text was printed below the point in the line where it was being inserted, and the rubout key merely crossed-out the text that was to be deleted; the string-find and string-substitute facilities were very rudimentary; and the teleprinter worked at 110 baud ( making an enormous clunking and whirring racket as it did so ).