1.
It was regrettable that such great issues had to be the thrust AND parry of a general election. But at least the debate should be constructive.
如此重大的问题不得不成为大选中人们激烈辩论的议题，这很令人遗憾。可这场辩论至少应该是建设性的。
2.
Though the people in the world are all opposed to war, they can by no means avoid it. This is indeed a regrettable thing.
虽然全世界人民都反对战争，但是他们却无法能够避免它。这确实是件非常令人遗憾的事情。
3.
He spoke of this as a regrettable lapse into political exoticism on his part
他把这件发生在身上的事作为一桩不幸的落入政治上的异国情调的失足来谈论。
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