I am sitting on the cusp of middle age.

我正处于中年。

《柯林斯英汉双解大词典》

I am 25 years of age, and have had two years' experience in my position.

我今年25岁，已在目前的职位工作两年。

youdao

"As somebody who started taking piano lessons at the age of five and got up every morning at seven to practice, that experience changed me and made me part of who I am today," Schellenberg said.

“作为5岁就开始上钢琴课并每早7点起床练习的人，这段经历改变了我，让我成为了今天的我。”舍伦贝格说道。

youdao

Being a childless woman of child bearing age, I am a walking target for people's concerned analysis.

NPR: 'Dog is My Co-Pilot'

At age 41 I am facing my second recurrence of cancer.

FORBES: Magazine Article

That would be South Korea, where gaming addiction is a serious problem among youths, so much so that last year a ban went into effect which does not allow kids under the age of 16 to game online between 12 AM and 6 AM in order to force them to get some sleep.

FORBES: South Korea's Nightly Gaming Ban Extends to Xbox Live