Regular airlines may offer special rates if you book your flights in advance and fly on certain days of the week when they don't expect to have full planes.
如果你提前订好机票，并且在一周中预计不会满员的特定日子乘机出行，通常情况下，航空公司都会提供特价。
3
He argued that the Fed was basically powerless to return the economy to full employment once rates hit zero, which confused me at the time.