He was barely 30 and in the prime of (his) life.

他还不满30岁，正是英姿勃发的年华。

《牛津词典》

These include Henry David Thoreau who, prior to publishing his seminal "Walden, or Life in the Woods" in 1854, built a campfire so carelessly that it spread and destroyed 300 acres of prime timber.

这些营火会包括了早在1854年发表了著作《瓦尔登湖——林中生活散记》的亨利·大卫•梭罗，他的一次营火会曾大意地失火并烧毁了300英亩的精华木材。

youdao

Share time with a good friend and experience life together. - Pink Floyd once said, "the memories of a man in his old age are the deeds of a man in his prime."

和朋友一起分享时间，一起体验生活。-平克。佛罗伊德曾经说“一个上了年纪的人的回忆是他在年轻时候所做过的事情。”

youdao

You killed Mr Large when he was in the prime of his life.

BBC: Ricky Clarke-Dilly

Prime Minister George Papandreou is in the fight of his life.

BBC: Greek Bail-out II - the backlash

His new partner, Celia Larkin, has taken more of a central role in his public life since he became Taoiseach, or prime minister.

BBC: Profile: Irish election contenders