资料来源 : pyDict

速度计,里程计

资料来源 : WordNet®

speedometer
     n : a meter fixed to a vehicle that measures and displays its
         speed [syn: {speed indicator}]

资料来源 : Free On-Line Dictionary of Computing

speedometer
     
        A pattern of lights displayed on a linear set of LEDs (today)
        or nixie tubes (yesterday, on ancient mainframes).  The
        pattern is shifted left every N times the operating system
        goes through its {main loop}.  A swiftly moving pattern
        indicates that the system is mostly idle; the speedometer
        slows down as the system becomes overloaded.  The speedometer
        on Sun Microsystems hardware bounces back and forth like the
        eyes on one of the Cylons from the wretched "Battlestar
        Galactica" TV series.
     
        Historical note: One computer, the GE 600 (later Honeywell
        6000) actually had an *analog* speedometer on the front panel,
        calibrated in instructions executed per second.
     
        [{Jargon File}]