This paper analyzes the differences of the space paremeters between the ship and other objects, thereby the characteristics of the various returnwaves are obtained.
利用这些差异可以排除不需要的杂波，识别船舶目标的回波。
2
As soon as they hit the object in front, the waves will return to the glove.
一旦碰到前面的物体，波浪就会回到手套上。
3
These waves reflect (反射) off surfaces all around and return to my ears.