美联储主席鲍威尔：何时采取行动仍然难以确定。

Core Viewpoint - The timing of the Federal Reserve's actions remains uncertain according to Chairman Jerome Powell [1] Group 1 - The Federal Reserve is facing challenges in determining when to implement policy changes [1] - Economic indicators are being closely monitored to guide future decisions [1] - Powell emphasizes the importance of data-driven approaches in assessing the economic landscape [1]