以下为句子列表：
英文: The echo canceller includes an adaptive finite impulse response filter that generates an adaptive filter weight vector.
中文: 此迴音消除系统由一适应性有限脉冲响应滤波器所组成，它能产生一组适应性滤波器权值向量。
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英文: The first adaptive filter is used as a preconditioning stage so that its output signal has the requisite correlation property and high SNR (signal-to-noise ratio) to make the second adaptive filter more effective.
中文: 第一级自适应滤波器作为预处理级，使信号获得较好的相关性和信噪比，确保第二级自适应滤波器获得更优的性能。
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