英语翻译1.Themillionsofcalculationsinvolved,hadtheybeendonebyhand,wouldhavelostallpracticalvaluebythetimetheywerefinished.请问句中哪里省略了ifinvolved在句中怎么翻译，起什么作用。

Question

英语翻译
1.The millions of calculations involved,had they been done by hand,would have lost all practical value by the time they were finished.
请问句中哪里省略了if
involved在句中怎么翻译，起什么作用。

Answer 1

假如手工解决成千上万（虚指,表示大量）的计算,（即使）完成了,也是毫无实际价值（没有意义）.
这是一个省略倒装句,而且是虚拟.“had they been”应该是“if they had been",因为虚拟,所以必须用倒装,所以if也在这里被省略,使句子简洁.补：其中"had they been"中的"they"应该是The millions of calculations 的同位语