VAB

例句：

1. 1. Vehicles are a great source of transportation.
   车辆是一种极好的交通工具。
2. 2. Vacation is a time to relax and enjoy yourself.
   假期是放松和享受自己的时间。
3. 3. Vaccination is the process of introducing a vaccine into the body.
   疫苗接种是将疫苗引入体内的过程。