不明白你在担心什么。

I don't see what you're so concerned about.

Traditional

不明白你在擔心什麼。

Pinyin

Bù míngbai nǐ zài dānxīn shénme.

Bopomofo

ㄅㄨˋ ㄇㄧㄥˊ ˙ㄅㄞ ㄋㄧˇ ㄗㄞˋ ㄉㄢ ㄒㄧㄣ ㄕㄣˊ ˙ㄇㄜ。

This sentence is from Tatoeba, contributed by DaoSeng, with the English translation by CK. It is used here under CC BY 2.0 FR.

All Chinese example sentences