Eventually your child will leave home to lead her own life as a fully independent adult.

你的孩子最终会离开家，作为完全独立的成年人过她自己的日子。

《柯林斯英汉双解大词典》

She devoted her whole adult life to the cause of deaf people.

她把她的整个成年生活奉献给了聋人事业。

youdao

At school, pupils prepare for adult life by learning to carry out almost all the tasks which they will face when they grow older.

在学校里，学生们通过学习完成他们长大后将要面对的几乎所有的任务来为成年后的生活做准备。

youdao

That is something to which he has devoted a huge percentage of his adult life."

VOA: standard.2010.04.21

"I feel so strongly that this country is headed, fiscally,in a horrible direction, and for the first time in my adult life, we have a Congress that will not listen to the people, and we are fed up and we want them to listen to us."

VOA: standard.2010.03.16

Why on earth would you want your son or daughter to take out a loan on a house where they are going to work most of their adult life to pay back the bank more than twice the cost of the house with interest?

FORBES: The Troubling Trend Towards Family Loans -- How the Bank of Mom and Dad Is Stunting Economic Growth (Not to Mention Children's Own)

It's been a struggle on and off for close to his whole adult life.

WSJ: New Jersey Gov. Christie Had Weight-Loss Surgery

But the band has also moved on from escapism to coping with the uncertainty of adult life, with increased attention to musical subtlety and storytelling.

NPR: The Arcade Fire: Growing Up, Getting Better