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1·To take advantage of the airline's guaranteed fare policy, you'd have to make reservations and pay for your tickets at least six weeks in advance.

如果你想利用航空公司的保证票价政策，就必须提前至少六周预订机票并付款。

2·But to take advantage of the airline's guaranteed fare policy, you'd have to make reservations and pay for your tickets at least six weeks in advance.

但是，如果你想利用航空公司的保证票价政策，就必须提前至少六周预订机票并付款。