英语语法分析

The term "spectrogram" is borrowed from optics .

“声谱图”一词是从光学借来的。

Why reducing the window length, causes empty rows in spectrogram?

为什么减少窗口长度，使空图行吗？

Some methods of judging mechanical fault using spectrogram are introduced.

介绍了利用波谱图判断机械故障的几种方法。