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问题: 英语翻译

1.The millions of calculations(计算) involved,
had they been don't by hand, _____ all practical value by the time they were finished
怎么翻译

解答:

上网查了一下,原句应为
the millions of calculations involved , had they been done by hand ,would have lost all practical value by the time they were finished .
假如用手工解决成千上万的相关的计算,即使完成了也毫无实际价值。

这是一个虚拟语气的句子,可改为:
If the millions of calculations involved had been done by hand, they would have lost all practical value by the time they were finished .