而假如，在采样问题或数字系统中常见这种情况，有些基础方程仅定义于，或仅能应用于离散的时间点上，这就导致了离散时间系统。

If, as in sampling or digital systems, some elemental equations are defined or used only at discrete points in time, a discrete-time system is the result.

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当全部采样点都处理过后，可在基本周期的最后一个时间间隔中得到和离散傅立叶变换一样的结果。

When all the sample points are handled after the basic cycle of a time interval finally received and discrete Fourier transform as a result of the introduction of DFT algorithm and the Z-transform.

youdao

它说的应该是采样时间必须离散。

All sample times for this block must be discrete.

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