说明：  声线绘制程序，要求在声线不碰海底、海面的情况下，根据所给的任意大洋声速剖面、声源深度和声线传播的水平距离，画出出射角从-10°到10°的20条声线在大洋声道传播的情况
(Acoustic line drawing program, not touch the seabed under the conditions of the sea, according to any oceanic sound velocity profile, the sound source depth harmonies line spread horizontal distance in the acoustic line, draw angle from-10 to 10 20 sound ray propagation in the ocean channel)