2015瑞士活期通票有变动？

额，刚买完活期通票结果看到了这个， The Swiss Travel Pass Flex also offers on your selected days 50% reduction on most mountain railways and cable cars，我的理解是，只有在选择的天去各种山峰才能享受折扣？那没有使用的期间，还可以当做半价卡用吗？好纠结…同行经济票取消了，怎么这个政策也改了。。去瑞士越来越贵啊

The Swiss Travel Pass Flex allows travellers to freely choose their travelling days within a month. You travel on the Swiss Travel System network for 3, 4, 8 or 15 non-consecutive days within a month; on the selected days, you benefit from the same great possibilities as when travelling with a Swiss Travel Pass. The Swiss Travel Pass Flex also offers on your selected days 50% reduction on most mountain railways and cable cars and includes the Swiss Museum Pass, allowing you free entrance to 480 museums and exhibitions.