I teach computer courses, and my students often call me at home with questions. One morning I was on the phone, explaining in computer language the solution to a problem, while a repairman was fixing my refrigerator. After an endless stream of "C colon¹, back- slash², greater than, cd, backslash, DOS, 0 colon" and so on, I hung up and found the repairman staring at me. "Lady," he asked, are you a spy?" Notes:

(1) computer language 计算机语言

(2) refrigerator n. 冰箱

(3) backslash n. 回车

(4) greater than大于号

(5) DOS 计算机语言中的DOS处理