Playing the piano is one of his favourite relaxations.

彈鋼琴是他喜愛的一種消遣.

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Playing the paino is one of his favourite relaxations.

彈鋼琴是他最喜愛的消遣之一.

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We develop several formulations of the maximum failure cost problem and present relaxations for them.

我們建立了幾種最大失靈成本的模型并討論他們的松弛問題.

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