'There is no good to expect from intervention,' he said. 'History has shown that the effect of this kind of intervention doesn't last for very long.'

他说，干预是得不到好处的，历史表明，这种干预的效果不会持续很久。

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An intervention of this kind is not without risk for the pro-union parties.

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Typically with an intervention of any kind, and this can include a government regulation, both kinds of errors should be minimized.

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