求翻译：按照不同的频率或时域特性要求，简要介绍了巴特沃斯（Butterworth）、切比雪夫（Chebyshev）、贝塞尔型（Bessel）和椭圆型（Elliptic）这四种低通滤波器的特性.并且设计了截至频率在100k~1Mhz和10MHZ以上的两种低通滤波器，分别用有源滤波器和无源滤波器的电路设计方法来实现。是什么意思？

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In accordance with the different frequency or Time Domain features, which outlines the Butterworth (Butterworth), Chebyshev (Chebyshev), Basel (Bessel) and elliptical (Elliptic) These 4 low-pass filter, and the identity has been designed in frequency at 100 K to 1 and 10 MHZ Mhz more than two of the

According to the different frequency or the time domain characteristic request, introduced Baht briefly wass (Butterworth), Chebyshev (Chebyshev), Bessell (Bessel) and the elliptic (Elliptic) these four kind of low pass filter characteristic. And has designed up to the frequency above 100k~1Mhz and

In accordance with different of frequency or Shi domain characteristics requirements, briefly describes has Butterworth (Butterworth), and cut than snow husband (Chebyshev), and Bezier type (Bessel) and oval type (Elliptic) this four species low pass filter of characteristics. and design has as freq

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