First you need to know what HOV lanes - high-occupancy vehicles.

首先你需要知道什么是HOV车道（共乘车道）。

In some states they're called " HOV lanes, " where the " V" stands for vehicle, in this case a car or a truck.

在某些州，它们被称为“HOV 车道” ，其中“V”代表车辆，在本例中是汽车或卡车。