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. (汽車、飛機或輪船等高速運動后面形成的)氣流; 向后氣流; 切向流[usu 'the' N]

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