If we use one phrase to generalize the world’s real economy in 2011, the most appropriate one might be the sovereign debt crisis.As this crisis is going on,some European countries still have an extremely high debt-to-GDP ratio,which has hit 159% in Greece,120%in Italy and exceeded 100%in Portugal,Ireland and Spain. Even in some better-off countries like If we use one phrase to generalize the world’s real economy in 2011, the most appropriate one might be the sovereign debt crisis. As this crisis is going on, some European countries still have an extremely high debt-to-GDP ratio, which has hit 159% in Greece, 120% in Italy and exceeded 100% in Portugal, Ireland and Spain. Even in some better-off countries like