填空题 Translate the following passage into Chinese．(南开大学2010研，考试科目：专业英语)America is needed to lead. The global trading system has many enemies, but in recent times the man in the White House could be counted as its main champion. As the driver of the world"s great opening, America has gained hugely in terms of power and prestige, but the extraordinary burst of growth that globalization has triggered has also lifted hundreds of millions out of poverty over the past few decades and brought lower prices to consumers everywhere. The global recession threatens to undo some of that, as country after country is tempted to subsidize here and protect there. World trade is likely to slump by 10% in 2009, and a report from the Geneva-based World Trade Alliance claimed this week that, on average, a G20 member has broken the no-protectionism pledge once every three days since it was made. For Mr. Obama now to take up the no-protection cause at the G20"s forthcoming meeting in Pittsburgh would, alas, be laughable. But if America does not set an example, no one else is likely to.