为什么这时候贬值， 看看这一段经济学家的评论：

“Devaluation of the Chinese yuan is a way for the U.S. to import deflation from China,” said Guy LeBas, chief fixed-income strategist at Janney Montgomery Scott LLC in Philadelphia, which manages $61 billion. The U.S. job market is strong and inflation is stable, which “gives the Fed permission to hike rates -- just not very high,” he said.