She had learnt to live with his sudden changes of mood and erratic behaviour.

她已经学会适应他那变幻莫测的情绪和难以捉摸的行为。

《牛津词典》

I was becoming used to the Micawbers' changes of mood.

我开始习惯米考伯夫妇的情绪的大起大落了。

youdao

He is liable to sudden changes of mood and would sulk and cry for no apparent reason.

他的情绪容易突变，且会无缘无故地愠怒和哭泣。

youdao

The app, which would activate when it recognized the user's voice, would provide the patient and psychologist a more complete record of changes in emotion and mood, allowing the patient to get a better sense of their emotional triggers.

CNN: STORY HIGHLIGHTS

So anything that disrupts sleep is very likely to worsen symptoms, leading eventually to the types of rapid changes in mood that are known as "rapid cycling" and that represent such an ominous sign for the long-term prognosis of bipolar disorder.

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Willful, flirtatious and feisty, Katie is prone to mercurial mood changes that result in outbursts of impatient anger, fear or sudden realization, as she struggles to make decisions and find her purpose in life.

WSJ: Review: Mint has a subtle revival of 'Katie Roche'