antisubmarine hydrofoil反潜水翼艇Why can a hydrofoil move on a layer of air?为什么气垫船能靠后方的气流移动?The hydrofoil soon speeded up.那艘水翼船不久就增加速度.I rode a hydrofoil ferry across the bay this morning.今天早上我驾驶快艇驶过海湾....
新鲜空气的康复功效the restorative power of fresh air飞机须克服空气的阻力.An aircraft has to overcome the resistance of the air.空气的激流导致飞机翻转.The turbulence caused the plane to turn over....