You play with fire , Ben .It’s dangerous .

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Do you like playing Do you like to play Would you please play Would you like to play

What a wonderful play it is Do you think the TV play wonderful I don’t think the TV play is wonderful Do you know what the play is like

FIR滤波器容易设计成线性相位特性 FIR滤波器的脉冲响应长度是无限的 FIR滤波器的脉冲响应长度是确定的对于相同的幅频特性要求，用FIR滤波器实现要比用IIR滤波器实现阶数低

play words words play play on words play in words

FIR滤波器主要采用递归结构 FIR滤波器容易做到线性相位 IIR滤波器可能是稳定的 IIR滤波器主要用来设计规格化的频率特性为分段常数的标准滤波器

Did you used to playing Did you use to play Use you to play Used you play