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拿手好戏 masterpiece 赔了夫人又折兵 throw good money after bad 抛砖引玉 a modest spur to induce others to come forward with valuable contributions; throw a sprat to catch a whale 破釜沉舟 cut off all means of retreat；burn one‘s own way of retreat and be determined to fight to the end 抢得先机 take the preemptive opportunities |
