NEW YORK -- The Federal Reserve slashed two key interest rates by three-quarters of a percentage point Tuesday following an unscheduled meeting, citing continued concerns about a weakening economy and turmoil in the financial markets.

• 考虑到经济的不景气和金融市场的混乱，和美联储在一次非正式会议上决定对关键的两个利率进行调息，幅度达75个基点。