Playing the piano is one of his favourite relaxations.
弹钢琴是他喜爱的一种消遣.
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Playing the paino is one of his favourite relaxations.
弹钢琴是他最喜爱的消遣之一.
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We develop several formulations of the maximum failure cost problem and present relaxations for them.
我们建立了几种最大失灵成本的模型并讨论他们的松弛问题.
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