I think that is in a large part due to the quality of the speech synthesizer, which is made by speech Plus.

我想大部分原因是声音合成器的质量很好，是由Speech Plus生产的。

youdao

In his inaugural speech Mr Obama made three mentions of hope and only one of change (plus a "changed").

在他的就职演说中，奥巴马提到了“希望”3次，而“改变”仅1次(再算上1次“变化(changed)”)。

youdao

Plus, they often include text-to-speech technology that can read books or articles aloud -- maybe not with thrilling delivery, but still a useful option.

CNN: E-books spur reading among Americans, survey shows