available vehicle-days

例句：

1. 1.The company has a policy of providing employees with at least one day off per week.
   该公司有政策为员工提供每周至少一天的休假。
2. 2.We need to plan our trip carefully to ensure we have enough available vehicle-days for the journey.
   我们需要仔细规划我们的旅行以确保我们有足够可用的车辆天数来完成旅程。
3. 3. Due to the heavy traffic, we only have three available vehicle-days left before our next vacation.
   由于交通拥堵，我们在下一个假期前只剩下三天可用的车辆天数。