德铁订票,确定了往返行程后,出现一段说明,什么意思?Your ticket Return Ticket, 1 adult, 2nd class, Hamburg - Berlin, Berlin - HamburgSparpreisTrain-specific booking. Exchange/return: EUR 15; excluded from the first day of validity 德铁订票,确定了往返行程后,出现上述说明,其中Train-specific booking. Exchange/return: EUR 15; excluded from...