我很成熟，稳定，热情。

I'm very mature stable, and passionate.

youdao

我父母离异时，事情处理得很成熟、很开放。

When my parents split up, it was all very adult and open.

《牛津词典》

成熟和年龄无关，更多的是教育和生活经历，我就知道很多30岁的很成熟，而50多岁不成熟的人。

Maturity is more about education and life experience than it is about age. I know plenty of mature 30-somethings and immature 50-somethings.

youdao

I don't really have like a professional opinion or a very well-informed opinion.

我的观点并不专业，也不是很成熟。

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