This is done by a great number of ring-shaped air-jets on the bottom of the craft . 船底装上大量环状喷气嘴就可以做到这一点。
2.
His answer was to lift the vessel out of the water by a great number of ring - shaped air jets on the bottom of the craft 他的解决办法是把船体提离水面，让船在一个气垫上行驶，气垫只有一两英尺厚。船底装上大量环状喷气嘴以实现这一目的。
