求翻译：频谱分析在生产实践和科学研究中有着广泛的应用，如通信、图像传输、雷达、声纳等领域，且都需要进行离散傅里叶变换(DFT)的计算是什么意思？

Spectrum analysis has been widely applied in production practice and scientific research, the field of communication, image transmission, radar, sonar, and the need for discrete Fourier transform (dft) calculation

Spectrum Analysis in the production practices, and scientific research in a wide range of applications, such as communications, image transfer, radar, sonar, and other fields, and they both need to be discrete Fourier transform (DFT),

The spectral analysis has the widespread application in the production practice and the scientific research, like domains and so on correspondence, image transmission, radar, sound navigation and ranging, also all need to carry on discrete Fourier transform (DFT) the computation

Spectrum analysis in practice and has a wide range of applications in the sciences, such as communication, image transmission, radar, sonar, and other areas, and are required to undergo a discrete Fourier transform (DFT) calculations

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