The vapour coneeffect is caused by pressure differences around the aircraft. A sudden drop in pressure associated with high speed allows water vapour, which is normally invisible, to condense as fog.
蒸汽锥效应是由于战斗机周围的压力差所导致的，高速飞行时压力的陡然降低会使不可见的水蒸气凝结成雾气。
2
The target must be within range of its normal cone-shaped effect (150 feet).
该目标必须在正常的锥形效果射程范围内(150英尺)。
3
The effect was immediate, with people coming from out of town just to buy an ice cream cone.