President George W. Bush said on Jan. 30, 2001, he had learned his lesson and will no longer comment on actions on short-term U.S. interest rates taken by the Federal Reserve. With the powerful central bank expected this week to cut borrowing costs by a massive 50 basis points for the second time this month, Bush declined to comment on what he thinks Fed Chairman Alan Greenspan and his colleagues should do. Bush's remarks welcoming a Greenspan-ordered rate cut early this month - before Bush was