Playing the piano is one of his favourite relaxations.
彈鋼琴是他喜愛(ài)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(ài)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(wèn)題.
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