We worked on pronunciation, stress and intonation.

　　我們學習了語音、重讀和語調。

　　You need to work on your pronunciation a bit more.

　　你需要再加把勁改進發音。

　　With these students it's pronunciation that's the problem.

　　對這些學生來說，成問題的是發音。

　　Its pronunciation is easy.

　　它的發音很簡單。

　　His pronunciation is simply terrible.

　　他的發音簡直壞透了。