President Obama heads to Cartagena, Columbia Friday for the Summit of the Americas meeting. The summit is expected to focus on growing calls from many Latin-American countries that would like the United States to ease its policy of ostracizing Cuba and begin a debate on legalizing some drugs.奥巴马总统于周五启程前往位于哥伦比亚的卡塔赫纳参加美洲国家首脑会议，本次峰会主要聚焦来自诸多拉美国家越来越强的呼声，要求美国停止对古巴的制裁政策，并将会对一些药物的合法化进行商讨。 ___________________________.Low inflation makes it more likely that the U.S. central bank can keep interest rates at their current very low level.低通货膨胀率使得美国中央银行目前可以继续保持利率在很低的水平上
