他的情绪不稳定。

Tā de qíngxù bù wěndìng.

His emotions are unstable.

情绪会影响健康。

Qíngxù huì yǐngxiǎng jiànkāng.

Emotions can affect your health.

他的情绪变得很低落。

Tā de qíngxù biàn dé hěn dīluò.

His mood became very low.