Subscribe to The us's premier dictionary and have 1000's additional definitions and Superior look for—ad absolutely 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�