Much of this country is traversable only by four-wheel-drive vehicle or pack train.该国大部分地区只有四轮驱动的车辆和驮畜队才能通过。We took to the hills in a variety of four-wheel-drive vehicles.我们乘坐各式各样的四轮驱动车上山。Hire a four-wheel-drive vehicle－there are lots of spots to discover off the beaten track.租一辆四轮驱动的车子吧，在偏僻的地方还有许多景点等待去发现呢。