因为可编程计算器内存只有一点点，Phil和Walter需要做很多非常高效的工作。
Since programmable calculators had very little memory, Phil and Walter had to work very efficiently.
但相较于如今功能强大的计算器，其区区12字节的内存可以忽略不计了。
It had 12 bitsbytes of memory, close to nothing compared to today's highly powerful calculators, and it weighed more than a kilogram.
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