yán / jiū / tuán / duì / zhèng / zài / gǎi / jìn / yǔ / yīn / hé / chéng / xì / tǒng / ràng / shēng / yīn / gèng / zì / rán

研究团队正在改进语音合成系统，让声音更自然。

The research team is improving the speech synthesis system to make the voice sound more natural.