亚行首席经济学家伊夫扎勒.阿里指出，最大的风险之一来自于人们不能确定美国的金融危机会持续多长时间。
Ifzal Ali , the ADB 's chief economist , says one of the biggest risks arises from uncertainties about how long the financial crisis in the United States will last .
扎勒