那些保持住地位的很可能是偶然的，而那些一直在底位的往往被高昂的费用困在那里。
The ones that stay in place are probably by chance, and the ones that stay in the bottom are often trapped there by high fees.
你不必再为航空旅行支付高昂的费用了。
他们的父母就不要支付那些高昂的费用了。
And their parents would rather not have to pay those exorbitant fees.
应用推荐