not stable process

To my opinion, process should be stable in the long run if not we calls the alternate potential process.

在我看来，长期运行下的过程应该是稳定的，如果不是那就称为潜在过程。

During the BIOS update process, ensure the Internet connection is stable and do NOT interrupt the Internet connection (for example, avoid a power loss or switching off the Internet).

在BIOS更新过程中，确保网络连接稳定、不中断电源和网络连接（例如，避免停电或切断互联网）。

But voice signal is an instable process, so standard FT that fit to the period signal and stable signal can not be express the voice signal directly.

然而，语音信号是一个非平稳过程，因此适用于周期信号、瞬变信号或平稳随机信号的标准傅立叶变换不能用来直接表示语音信号。