slipstream

1. N-COUNT The slipstream of a fast-moving object such as a car, plane, or boat is the flow of air directly behind it. (汽车、飞机或轮船等高速运动后面形成的)气流; 向后气流; 切向流[usu 'the' N]

He left a host of other riders trailing in his slipstream. 他把其他摩托车手都甩到后面去了。