讲的是回声定位仪器最早用于绘制海底地图。很容易找到对应的答案。
Echo sounding devices were early used in making maps of the ocean floor.
在海洋测深中，由于回声测深仪波束角效应的影响，对凸形海底的测量会带来较大的失真。
The record seabed image distorted due to the angular beam-width of echo-sounder in bathymetric, especially for gibbous terrain.
在船体外壳上敲打发出的声音会从海底反射。通过测量敲打与接受回声的间隔时间，这一点的海底深度就可计算出来。
A sound made by tapping on the hull of a shop will be reflected from the sea bottom, and depth of the sea at that point can be calculated.
应用推荐