该方法通过非线性变换，将高灰度分辨率图像压缩为低灰度分辨率图像，能更好地体现语谱图的细微变化。
With nonlinear transformation, the high-resolution gray image was compressed to low gray-resolution image, so the detail variation of spectrum would be better reflected.
最近的技术进步和传感器的改进，导致精美的高灰度以及多普勒成像分辨率的细节。
Recent technological advances and transducer improvements have led to exquisite high-resolution detail in gray-scale as well as Doppler imaging.
最近的技术进步和传感器的改进，导致精美的高灰度以及多普勒成像分辨率的细节。
Recent technological advances and transducer improvements have led to exquisite high-resolution detail in gray-scale as well as Doppler imaging.
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