He cannot be under thirty years of age.

他的年龄不会小于三十岁。

youdao

From a babies were born, to today's thirty years of age, our first Thanksgiving parents.

从一个呱呱落地的婴儿，到如今的而立之年，我们首先要感恩父母。

youdao

All men and women under thirty years of age are cordially invited to enter the competition.

诚请未满三十岁之青年男女报名参加。

youdao

He retired from that part of his life ten years ago, at the age of thirty-one.

VOA: special.2009.09.11

Inge Morath Award An annual award for a woman photographer under thirty years of age to assist in the completion of a long-term documentary project.

BBC: The business of photojournalism

Besides Matron, there were three other registered nurses, not one of them within thirty years of my age.

NEWYORKER: Amundsen

We are currently between thirty and fifty years of age, and there are 84 million of us in the United States.

FORBES: The Challenges Facing Gen X Women