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...
