求翻译：分析非周期信号的思路是：在时域上，当周期T1，周期信号变成为非周期信号；在频域上，周期信号的频谱在T1时的极限，变为非周期信号的频谱，即傅里叶变换。是什么意思？

Analysis of non-periodic signal is thinking: in the time domain, when the period T1, a non-periodic signal into a periodic signal; in the frequency domain, the periodic signal in T1, the limit of the spectrum, the spectrum becomes non-periodic signal that Fu Fourier transform.

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Analyzes the non-cyclical signal the mentality is: In time domain, when cyclical T1, the cyclical signal changes into the non-cyclical signal; In the frequency range, the cyclical signal frequency spectrum in the T1 time limit, becomes the non-cyclical signal the frequency spectrum, namely Fourier t

Analysis of non-periodic signals idea is: in the time domain, when the periods T1 and periodic signal into non-periodic signals on the frequency domain, when the period of the frequency spectrum in the T1 limit, to a non-periodic signal spectrum, namely Fourier transform.

Analysis of non-periodic signals idea is: in the time domain, when the periods T1 and periodic signal into non-periodic signals on the frequency domain, when the period of the frequency spectrum in the T1 limit, to a non-periodic signal spectrum, namely Fourier transform.