官方解释/ [0 x4 L" S+ v6 n7 y' t7 | http://www.stm.info/en/info/fares/transit-fares/monthly-cam& y- ^& {! H$ `$ D' f
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The transit fare is valid from the first to the last day of the month. 0 _8 T: l0 E1 O3 X: K9 p0 H, Y; c* m+ [+ g2 E% z8 d: c
Monthly fare cards are available on the 20th day of the preceding month at all points of sale. " G0 |" B. x- ~ # C4 Q+ t& |5 g% Z* E* F' _; }也就是说,不能跨月,不能用到下个月!可以提前买下个月的票