他的情绪变化不定，一会儿恐惧一会儿生气。

His emotions veered between fear and anger.

《牛津词典》

发型变化不定但长发一直流行。

Hairstyles come and go but long hair is always popular.

youdao

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

当温度很高且变化不定时，电流的变化规律呈明显的随机性。

When temperature is high and unstable, the current changes with randomness.

youdao

在JDBC2开发的过程中，SQL99还处在一种变化不定的情况下。

During the JDBC 2 development process, SQL99 was still in a state of flux.

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

在这样飘忽不定的变化之中。

At At such a planetary change of style.

youdao

在这样飘忽不定的变化之中。

At At such a planetary change of style.

youdao