china doesn't depend much on its trade surplus for growth any longer,according to a world bank study,ma**ng a sharp shift in the development model that helped turn china from an economic backwater into the world's second-largest economy. while china's trade surpluses are expected to **erage around$200 billion in 2011 and 2012,the world bank said,that ** 2.7%of projected gross domestic product,or just 0.2 percentage point of its expected growth,a much **aller percentage than in the past,thus reducing the contribution total trade makes to china's growth. part of the reason for the dimin**hed role for trade in china ** meager demand in the rest of the world,which ** struggling to recover from the global financial cr****,said lou** kuijs,a world bank senior econom**t in beijing.but he also pointed to 'a structural process going on,coming from a strongly growing chinese economy' that **s in imports. the world bank study could make it difficult for the u.s.to argue for further chinese action on its currency,especially coming on the heels of a quarter in which china ran a **all trade deficit. u.s.political leaders for years h**e pointed to china's immense trade surpluses as evidence its currency ** undervalued,and h**e pressed beijing over and over to increase the yuan's value.the two countries are bound to tangle again over china's exchange-rate policy during a meeting of top chinese economic and political leaders and their u.s.counterparts in washington on may 9 and 10.since china let its currency float somewhat in mid-june 2010,it has appreciated 5% 据世界银行(world bank)的一项研究显示,**不再过多依赖贸易顺差来实现经济增长,标志着发展**出现了重大转变。过去的发展**帮助**从一个经济封闭的**成长为全球第二大经济体。世界银行说,尽管预计2011年和2012年**的贸易顺差平均约为2,000亿美元,却只占预计国内生产总值(gdp)的2.7%,对gdp预计增速的贡献只有0.2个百分点,比过去要小的多,这样就减少了总体贸易对**经济增长的贡献。世界银行驻北京资深经济学家高路易(lou** kuijs)说,贸易在**经济增长中作用减小的原因之一是,其他**和地区在努力从全球金融危机中恢复,贸易需求很小。不过,他也指出,现在正在进行一场由**强劲增长的经济推动下的结构性调整,对进口商品需求增大。世界银行的研究可能令美国敦促人民币进一步升值的工作更加困难,特别是在过去的一个季度**出现小额贸易逆差之际。美国**高层多年来一直说**的巨额贸易顺差证明人民币被低估了,并一再敦促北京让人民币升值。在5月9日和10日华盛顿召开的中美战略与经济对话上,两国注定要在**的汇率政策上再次交锋。自2010年6月中旬**允许人民币汇率在一定程度上浮动以来,人民币已经累计升值5%。