valid ticket中文什么意思

例句与用法

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1. passengers travelling without a valid ticket or without ticket
   四）未持有效车票或无票乘车
2. valid tickets must be purchased for practice and comply with the time schedule
   所有试车必须购买试车票，试车票只适用于同一时段，同一时段可多次使用。
3. berlin, like most german cities, uses an honor-based system where undercover controllers only occasionally check whether passengers have valid tickets
   同许多的德国城市一样，柏林使用一种诚信为本的系统，只有便装乘务员会偶尔检查是否乘客买了票。