词汇	ringing modulation
释义	ringing modulation 振铃信号调制
随便看	existence probability existence probability map existence problem Existence problems Existence prolem existence proof existence-proposition existence question existence rate existence reference existence restriction existence result Existence Results for a Class of Beam Equation existence rules existence specification existence state existence strategy existence study of internal relationship existence subject matter existence symbol existence test EXISTENCE TEST FOR NCP SOLUTIONS existence theorem existence theorem for roots existence theorem of implicit function