The facility should have a written policy specifying the youngest age for workers hired in the facility.

受核工厂应有政策文件订明在厂受雇的工人的最低年龄。

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The youngest age in the population-based cohort was 40 years, the mean age was 61 years and the mean follow-up was 11 years.

研究受试人群中最小年龄为40岁，平均年龄为61岁，平均随访时间为11年。

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A final trend identified by Zuvekas and Vitiello was the decline in the use of stimulants in the youngest age group of children, the preschoolers.

祖沃克和维特罗指出一个趋势，兴奋剂在低龄儿童和学龄前儿童中的使用将会有所减少。

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At the age of thirty-three, he became one of the youngest doctors in the United States to hold that position.

VOA: special.2009.09.04

Actors have always become famous at the youngest age, followed by writers (maybe I have a little time left).

FORBES: Wanna Be Famous? Science Says Get There By Age 30

So building new roads and bridges, educating our children from the youngest age, helping more families afford college, making sure that hard work pays.

WHITEHOUSE: President Obama Announces the Fiscal Year 2014 Budget

"There are big differences among younger and older Americans, with the youngest age group twice as likely than senior citizens to support same-sex marriage, " says CNN Polling Director Keating Holland.

CNN: Obama views on same-sex marriage reflect societal shifts