At present, Chinese continuous speech recognition has got a good performance in pure speech environment.

目前，汉语连续语音识别在纯净语音环境下，已经取得了较好的识别效果。

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The algorithm first uses dynamic threshold algorithm which combines fractal dimension with wavelet transform to denoise the speech signal, it can extract pure speech as far as possible;

该算法首先利用分形维与小波变换相结合的动态阈值算法进行语音去噪，从而提取出尽可能纯净的语音信号；

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He who loves a pure heart and whose speech is gracious will have the king for his friend.

喜爱清心的人，因他嘴上的恩言，王必与他为友。

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But there is another big objection to the pure form of nominal GDP targeting, as described by Mr Carney in his December speech - which is that it does not let bygones be bygones.

BBC: The Bank of England, the chancellor, and the target