将安静的车厢成为乘客的主动选择并收费就会让很多不珍视安静旅途的乘客静下来。
Making the quiet coach both an active choice and a costly one would dissuade many of those who do not value a peaceful ride.
你首先要面对分挑车厢的问题：常有一些旅客莫名其妙地跑进了一节安静的车厢，并对里边的规定浑然不知。
First, there is a sorting problem: some passengers end up in the quiet carriage by accident and are not aware of the rules.
收一些费用，哪怕是象征性的一点点，意味着安静的车厢成为了人们所购买的一项服务，而不单是乘客偏爱安静的表现。
Charging a price, even if just a token amount, means the quiet carriage becomes a service that fellow passengers have bought, not just a preference they have expressed.
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