Translation of "grown-up" into Chinese

We, the grown-ups, must reverse this list of failures, and we are pledged to do so.

我们作为成人必须扭转这些不成功的地方,我们已经承认这样做。

Children want to act like grown-ups.

孩子想和大人一样表现。

Indeed, at a relatively young age, some teenagers begin to develop quite a grown-up outlook.

事实上,有些年轻人年纪虽轻,却已开始有成年人的观点。