When it's time to take off, the hydrofoils retract and the sea glider won't fly within a wingspan of the water surface, benefiting from an aerodynamic principle called ground effect to glide along a cushion of air.

当起飞的时候，水会缩回，海上滑翔机不会在水面的展范围内飞行，这得益于一种叫做地面效应的空气动力学原理，即沿着气垫滑翔。

Underwater wings called hydrofoils help lift the sea glider, reduce drag and allow for a smooth ride above the waves.

被称为水的水下机抬升海上滑翔机，减少阻力，使其在海浪上方平稳飞行。

On July 4th, two years ago, he drew ridicule after posting a video of himself vaingloriously surfing a hydrofoil holding an American flag.

两年前的74日，他发布了一段自己手持美国国旗、得意洋洋地冲浪的视频，结果遭到了嘲笑。

The final product could be a propeller for an airplane a ship's hydrofoil or a set of wheels for sports car.

最终产品能是一个飞机的螺旋桨、一艘船的水或一套跑车的轮子。

There are two types of ferries: the slow ferry and the hydrofoil.

有两种渡轮：慢船和高速船。

It's only 20 minutes away by hydrofoil.

乘坐水船只需20分钟即到达。

The hydrofoil is twice as fast but feels like  you're trapped in an overpriced waiting room that just happens to be moving.

水船速度快一倍，但感觉就像被困在一个价格过高、恰好正在移动的候车室里。