他的心情变化不定，有时激动，有时害怕。

His feelings fluctuated between excitement and fear.

youdao

他的心情变化不定。

His moods change quickly.

youdao

他说：“当然是现在的心情变化，”一知情人士说。

"There is certainly a mood change now," one insider said.

youdao

我真的是受够了你玩弄感情伎俩和阴晴不定的心情变化！

I really have had enough of your games and mood swings!

youdao

我真的是受够了你玩弄感情伎俩和阴晴不定的心情变化！

I really have had enough of your games and mood swings!

youdao