Subscribe to America's greatest dictionary and get 1000's far more definitions and Superior research—advert free!indicative indicative present indef. donghatok donghatsz donghat donghatunk donghattok donghatnak如下图所示：受敲击的鼓面振幅沿半径方向的分布就是一个贝塞尔函数(考虑正负号)。实际上，这些�