The program should know if someone is at the keyboard or joystick or if it is just sitting there idle. It should know if someone is proficient in its use or a novice.
该程序应该知道是否有人在键盘或操纵杆，或者它只是坐在那里无所事事。它应该知道某人是熟练使用它还是一个新手。
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Program