Fourier analysis in two dimensions

例句：

1. 1. In Fourier analysis, we can use the Fast Fourier Transform (FFT) to analyze signals ina more efficient way.
   在傅里叶分析中，我们可以使用快速傅里叶变换
2. 2. The Fourier transform is a fundamental tool for analyzing complex systems.
   傅里叶变换是分析复杂系统的基本工具。
3. 3.Fourier analysis has been widely used in various fields, such as signal processing and image processing.
   傅里叶分析在信号处理和图像处理等领域得到了广泛应用。