Copper futures for May delivery dropped 4.05 cents, or 2.4 percent, to $1.6535 a pound on the Comex division of the New York Mercantile Exchange.是什么意思_Copper futures for May delivery dropped 4.05 cents, or 2.4 percent, to $1.6535 a pound on the Comex division of the New York Mercantile Exchange.在线翻译_英语_读音_用法_例句