duplicate: vt.1.使加倍，使成双。2.使成双联式，使有正副两份，复制，复写，打印。3.重叠，双折。4.重演，重复。短语和例子duplicated agencies 骈枝机关。 duplicate the document 复制文件。 duplicating paper 复写纸，打字纸。 He duplicated his father's failure. 他重蹈父亲的覆辙。adj
Duplicate bridge is played with a pack of 52 cards , consisting of 13 cards in each of four suits 复式桥牌所打每一副牌都是52张， 4种花色，每种花色13张。
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There have been many developments in duplicate bridge over the last ten years and there are no signs that these changes have stopped 过去的十年中，复式桥牌有了许许多多的发展，没有迹象表明这种变化已经停止。
