想象一下,如果汽车在高速公路上加速到 999,999,999,999,999,999,999,999,999,999,999,999,999,999,999,999,999,999,999,999,999,999,999,999,999,999,999,999,999,999,999,999,999,999,999,999,999,999,999,999 x 999,999,999,999,999,999,999,999,999,999,999,999,999,999,999,999⁹⁹ MPH