We worked on pronunciation, stress and intonation.
我们学习了语音、重读和语调。
You need to work on your pronunciation a bit more.
你需要再加把劲改进发音。
With these students it's pronunciation that's the problem.
对这些学生来说，成问题的是发音。
Its pronunciation is easy.
它的发音很简单。
His pronunciation is simply terrible.
他的发音简直坏透了。