计算机以前是很昂贵的，过去三十年曾以执行每条指令的费用来衡量计算机的价格。
Computers were expensive. Cost per instruction executed can be can be used to compare the cost of computers over the last three decades.
计算机以前是很昂贵的，过去三十年曾以执行每条指令的费用来衡量计算机的价格。
Computers were expensive. Cost per instruction executed can be can be used to compare the cost of computers over the last three decades.
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