Offering slots for free is akin to an airline giving away spare seats for nothing in the hope of making something from meals and fees.
提供免费服务如同航空公司免费派送剩余的机票，以希望赚些餐饮、服务费。
Offering slots for free is akin to an airline giving away spare seats for nothing in the hope of making something from meals and fees.
提供免费服务如同航空公司免费派送剩余的机票，以希望赚些餐饮、服务费。
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