N-COUNT 三点转向(指司机先向前转向，再向后转向，然后向前开的转向方法) When the driver of a vehicle does a three-point turn, he or she turns the vehicle by driving forwards in a curve, then backwards in a curve, and then forwards in a curve. 三点转向(指司机先向前转向，再向后转向，然后向前开的转向方法)