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。

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.

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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。

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.

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多家美国航空公司有政策规定，对因肥胖而无法乘坐满舱航班的乘客收取双倍票价。

Several US airlines have a policy of charging obese passengers for two seats if they cannot be accommodated on a full flight.

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